Periodic Table

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Atomic Number:	1	Atomic Radius:	110 pm (Van der Waals)
Atomic Symbol:	H	Melting Point:	-259.34 °C
Atomic Weight:	1.008	Boiling Point:	-252.87 °C
Electron Configuration:	1s1	Oxidation States:	1, -1

Hydrogen is the lightest element. It is by far the most abundant element in the universe and makes up about about 90% of the universe by weight. It is also the most abundant element in the earth’s sun.

Hydrogen as water (H₂O) is absolutely essential to life and it is present in all organic compounds. Hydrogen is the lightest gas. Hydrogen gas was used in lighter-than-air balloons for transport but is far too dangerous because of the fire risk (Hindenburg). It burns in air to form only water as waste product and if hydrogen could be made on sufficient scale from other than fossil fuels then there might be a possibility of a hydrogen economy.

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Helium is one of the so-called noble gases. Helium gas is an unreactive, colourless, and odourless monoatomic gas. Helium is available in pressurised tanks.

Helium is the second most abundant element in the universe after hydrogen. α-particles are doubly ionised helium atoms, He²⁺.

Helium is used in lighter than air balloons and while heavier than hydrogen, is far safer since helium does not burn. Speaking after breathing an atmosphere rich in helium results in a squeaky voice (don’t try it!).

Helium is present in the atmosphere at about 0.0005% (1 part in 200000) by volume and is an important component within hydrocarbon gases in the USA. Its origin in these gases is traced to the decay of radioactive elements in rocks.

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Lithium is a Group 1 (IA) element containing just a single valence electron (1s²2s¹). Group 1 elements are called “alkali metals”. Lithium is a solid only about half as dense as water and lithium metal is the least dense metal. A freshly cut chunk of lithium is silvery, but tarnishes in a minute or so in air to give a grey surface. Its chemistry is dominated by its tendency to lose an electron to form Li⁺. It is the first element within the second period.

Lithium is mixed (alloyed) with aluminium and magnesium for light-weight alloys, and is also used in batteries, some greases, some glasses, and in medicine.

Lithium does not occur as the free metal in nature because of its high reactivity. Deposits are known all aroun the world. It is a minor component of nearly all igneous rocks and is a component of many natural brines.

https://www.youtube.com/watch?v=wY0afMI4Jgc[/ultimate_modal][/vc_column_inner][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9229|url^https://classhall.com/wp-content/uploads/2017/03/Be.jpg|caption^null|alt^null|title^Be|description^null” modal_title=”Be” modal_on=”image” btn_img=”id^9229|url^https://classhall.com/wp-content/uploads/2017/03/Be.jpg|caption^null|alt^null|title^Be|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491170913767{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”]Radium is a chemical element with symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals.[/ultimate_modal][/vc_column_inner][vc_column_inner width=”1/6″][/vc_column_inner][/vc_row_inner][/vc_column][vc_column width=”1/4″][vc_row_inner content_placement=”middle” css=”.vc_custom_1491092842445{margin-right: -47.5px !important;margin-left: -47.5px !important;}”][vc_column_inner width=”1/6″][/vc_column_inner][vc_column_inner width=”1/6″][/vc_column_inner][vc_column_inner width=”1/6″][/vc_column_inner][vc_column_inner width=”1/6″][/vc_column_inner][vc_column_inner width=”1/6″][/vc_column_inner][/vc_row_inner][/vc_column][vc_column width=”1/4″][vc_row_inner content_placement=”middle” css=”.vc_custom_1491092907851{margin-right: -48px !important;margin-left: -48px !important;}”][vc_column_inner width=”1/6″][/vc_column_inner][vc_column_inner width=”1/6″][/vc_column_inner][vc_column_inner width=”1/6″][/vc_column_inner][vc_column_inner width=”1/6″][/vc_column_inner][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9227|url^https://classhall.com/wp-content/uploads/2017/03/B.jpg|caption^null|alt^null|title^B|description^null” modal_title=”Boron” modal_on=”image” btn_img=”id^9227|url^https://classhall.com/wp-content/uploads/2017/03/B.jpg|caption^null|alt^null|title^B|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491171306904{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”][/ultimate_modal][/vc_column_inner][/vc_row_inner][/vc_column][vc_column width=”1/4″][vc_row_inner content_placement=”middle” css=”.vc_custom_1491092519170{margin-right: -47.5px !important;margin-left: -47.5px !important;}”][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9234|url^https://classhall.com/wp-content/uploads/2017/03/C.jpg|caption^null|alt^null|title^C|description^null” modal_title=”Carbon” modal_on=”image” btn_img=”id^9234|url^https://classhall.com/wp-content/uploads/2017/03/C.jpg|caption^null|alt^null|title^C|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491171552139{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”]tyuiop gfytre dsdtyui hyuiop pofd hgfdfghj fdsdfghjkl fghjkl fghjk fghjkl tyuio jk ghjkl yuiop thyjk fghjkl dfghjkl ertyuio rtyuiop rtyuio hjkl ghjkl; ghjkl rtyuiop jkltyujkilhjk[/ultimate_modal][/vc_column_inner][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9282|url^https://classhall.com/wp-content/uploads/2017/03/N.jpg|caption^null|alt^null|title^N|description^null” modal_title=”P” modal_on=”image” btn_img=”id^9282|url^https://classhall.com/wp-content/uploads/2017/03/N.jpg|caption^null|alt^null|title^N|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491171723350{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”]fghjkllgttyuiol[/ultimate_modal][/vc_column_inner][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9290|url^https://classhall.com/wp-content/uploads/2017/03/O.jpg|caption^null|alt^null|title^O|description^null” modal_title=”Oxygen” modal_on=”image” btn_img=”id^9290|url^https://classhall.com/wp-content/uploads/2017/03/O.jpg|caption^null|alt^null|title^O|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491172009116{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”][/ultimate_modal][/vc_column_inner][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9252|url^https://classhall.com/wp-content/uploads/2017/03/F.jpg|caption^null|alt^null|title^F|description^null” modal_title=”F” modal_on=”image” btn_img=”id^9252|url^https://classhall.com/wp-content/uploads/2017/03/F.jpg|caption^null|alt^null|title^F|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491172188757{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”][/ultimate_modal][/vc_column_inner][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9286|url^https://classhall.com/wp-content/uploads/2017/03/Ne.jpg|caption^null|alt^null|title^Ne|description^null” modal_title=”Ne” modal_on=”image” btn_img=”id^9286|url^https://classhall.com/wp-content/uploads/2017/03/Ne.jpg|caption^null|alt^null|title^Ne|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491172315377{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”][/ultimate_modal][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row equal_height=”yes” content_placement=”middle” padding_top=”” padding_bottom=”” css=”.vc_custom_1491174030973{margin-top: -5px !important;margin-bottom: 1.5px !important;padding-right: 20px !important;padding-left: 20px !important;}”][vc_column width=”1/4″][vc_row_inner content_placement=”middle” css=”.vc_custom_1491092452642{margin-right: -47.5px !important;margin-left: -47.5px !important;}”][vc_column_inner width=”1/6″][vc_empty_space][/vc_column_inner][vc_column_inner width=”1/6″][ult_buttons btn_title=”3″ btn_align=”ubtn-center” btn_size=”ubtn-large” btn_bg_color=”” icon_size=”32″ btn_icon_pos=”ubtn-sep-icon-at-left” btn_font_size=”desktop:16px;” css_adv_btn=”.vc_custom_1491256701436{margin-right: -10px !important;margin-left: -10px !important;}”][/vc_column_inner][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9283|url^https://classhall.com/wp-content/uploads/2017/03/Na.jpg|caption^null|alt^null|title^Na|description^null” modal_title=”Sodium” modal_on=”image” btn_img=”id^9283|url^https://classhall.com/wp-content/uploads/2017/03/Na.jpg|caption^null|alt^null|title^Na|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_color=”#000000″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491168171322{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”]Francium occurs as a result of α disintegration of actinium. Francium is found in uranium minerals, and can be made artificially by bombarding thorium with protons. It is the most unstable of the first 101 elements. The longest lived isotope, ²²³Fr, a daughter of ²²⁷Ac, has a half-life of 22 minutes.[/ultimate_modal][/vc_column_inner][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9278|url^https://classhall.com/wp-content/uploads/2017/03/Mg.jpg|caption^null|alt^null|title^Mg|description^null” modal_title=”Magnesium” modal_on=”image” btn_img=”id^9278|url^https://classhall.com/wp-content/uploads/2017/03/Mg.jpg|caption^null|alt^null|title^Mg|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491168344269{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”]Radium is a chemical element with symbol Ra and atomic number 88. It is the sixth element in group 2 of the periodic table, also known as the alkaline earth metals.[/ultimate_modal][/vc_column_inner][vc_column_inner width=”1/6″][/vc_column_inner][/vc_row_inner][/vc_column][vc_column width=”1/4″][vc_row_inner content_placement=”middle” css=”.vc_custom_1491092842445{margin-right: -47.5px !important;margin-left: -47.5px !important;}”][vc_column_inner width=”1/6″][/vc_column_inner][vc_column_inner width=”1/6″][/vc_column_inner][vc_column_inner width=”1/6″][/vc_column_inner][vc_column_inner width=”1/6″][/vc_column_inner][vc_column_inner width=”1/6″][/vc_column_inner][/vc_row_inner][/vc_column][vc_column width=”1/4″][vc_row_inner content_placement=”middle” css=”.vc_custom_1491092907851{margin-right: -48px !important;margin-left: -48px !important;}”][vc_column_inner width=”1/6″][/vc_column_inner][vc_column_inner width=”1/6″][/vc_column_inner][vc_column_inner width=”1/6″][/vc_column_inner][vc_column_inner width=”1/6″][/vc_column_inner][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9221|url^https://classhall.com/wp-content/uploads/2017/03/Al.jpg|caption^null|alt^null|title^Al|description^null” modal_title=”Aluminium” modal_on=”image” btn_img=”id^9221|url^https://classhall.com/wp-content/uploads/2017/03/Al.jpg|caption^null|alt^null|title^Al|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491169357406{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”][/ultimate_modal][/vc_column_inner][/vc_row_inner][/vc_column][vc_column width=”1/4″][vc_row_inner content_placement=”middle” css=”.vc_custom_1491092519170{margin-right: -47.5px !important;margin-left: -47.5px !important;}”][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9313|url^https://classhall.com/wp-content/uploads/2017/03/Si.jpg|caption^null|alt^null|title^Si|description^null” modal_title=”Si” modal_on=”image” btn_img=”id^9313|url^https://classhall.com/wp-content/uploads/2017/03/Si.jpg|caption^null|alt^null|title^Si|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491169447251{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”]tyuiop gfytre dsdtyui hyuiop pofd hgfdfghj fdsdfghjkl fghjkl fghjk fghjkl tyuio jk ghjkl yuiop thyjk fghjkl dfghjkl ertyuio rtyuiop rtyuio hjkl ghjkl; ghjkl rtyuiop jkltyujkilhjk[/ultimate_modal][/vc_column_inner][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9292|url^https://classhall.com/wp-content/uploads/2017/03/P.jpg|caption^null|alt^null|title^P|description^null” modal_title=”P” modal_on=”image” btn_img=”id^9292|url^https://classhall.com/wp-content/uploads/2017/03/P.jpg|caption^null|alt^null|title^P|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491169576214{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”]fghjkllgttyuiol[/ultimate_modal][/vc_column_inner][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9309|url^https://classhall.com/wp-content/uploads/2017/03/S.jpg|caption^null|alt^null|title^S|description^null” modal_title=”S” modal_on=”image” btn_img=”id^9309|url^https://classhall.com/wp-content/uploads/2017/03/S.jpg|caption^null|alt^null|title^S|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491169710084{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”][/ultimate_modal][/vc_column_inner][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9239|url^https://classhall.com/wp-content/uploads/2017/03/Cl.jpg|caption^null|alt^null|title^Cl|description^null” modal_title=”Chlorine” modal_on=”image” btn_img=”id^9239|url^https://classhall.com/wp-content/uploads/2017/03/Cl.jpg|caption^null|alt^null|title^Cl|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491169853028{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”][/ultimate_modal][/vc_column_inner][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9223|url^https://classhall.com/wp-content/uploads/2017/03/Ar.jpg|caption^null|alt^null|title^Ar|description^null” modal_title=”Ar” modal_on=”image” btn_img=”id^9223|url^https://classhall.com/wp-content/uploads/2017/03/Ar.jpg|caption^null|alt^null|title^Ar|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491169962992{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”][/ultimate_modal][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row equal_height=”yes” content_placement=”middle” padding_top=”” padding_bottom=”” css=”.vc_custom_1491173996021{margin-top: -5px !important;margin-bottom: 1.5px !important;padding-right: 20px !important;padding-left: 20px !important;}”][vc_column width=”1/4″][vc_row_inner content_placement=”middle” css=”.vc_custom_1491092452642{margin-right: -47.5px !important;margin-left: -47.5px !important;}”][vc_column_inner width=”1/6″][vc_empty_space][/vc_column_inner][vc_column_inner width=”1/6″][ult_buttons btn_title=”4″ btn_align=”ubtn-center” btn_size=”ubtn-large” btn_bg_color=”” icon_size=”32″ btn_icon_pos=”ubtn-sep-icon-at-left” btn_font_size=”desktop:16px;” css_adv_btn=”.vc_custom_1491256739350{margin-right: -10px !important;margin-left: -10px !important;}”][/vc_column_inner][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9269|url^https://classhall.com/wp-content/uploads/2017/03/K.jpg|caption^null|alt^null|title^K|description^null” modal_title=”K” modal_on=”image” btn_img=”id^9269|url^https://classhall.com/wp-content/uploads/2017/03/K.jpg|caption^null|alt^null|title^K|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_color=”#000000″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491164963278{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”]Francium occurs as a result of α disintegration of actinium. Francium is found in uranium minerals, and can be made artificially by bombarding thorium with protons. It is the most unstable of the first 101 elements. The longest lived isotope, ²²³Fr, a daughter of ²²⁷Ac, has a half-life of 22 minutes.[/ultimate_modal][/vc_column_inner][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9235|url^https://classhall.com/wp-content/uploads/2017/03/Ca.jpg|caption^null|alt^null|title^Ca|description^null” modal_title=”Carbon” modal_on=”image” btn_img=”id^9235|url^https://classhall.com/wp-content/uploads/2017/03/Ca.jpg|caption^null|alt^null|title^Ca|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491165050920{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”]Radium is a chemical element with symbol Ra and atomic number 88. 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Francium is found in uranium minerals, and can be made artificially by bombarding thorium with protons. It is the most unstable of the first 101 elements. The longest lived isotope, ²²³Fr, a daughter of ²²⁷Ac, has a half-life of 22 minutes.[/ultimate_modal][/vc_column_inner][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9316|url^https://classhall.com/wp-content/uploads/2017/03/Sr.jpg|caption^null|alt^null|title^Sr|description^null” modal_title=”Sr” modal_on=”image” btn_img=”id^9316|url^https://classhall.com/wp-content/uploads/2017/03/Sr.jpg|caption^null|alt^null|title^Sr|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491159242290{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”]Radium is a chemical element with symbol Ra and atomic number 88. 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Francium is found in uranium minerals, and can be made artificially by bombarding thorium with protons. It is the most unstable of the first 101 elements. The longest lived isotope, ²²³Fr, a daughter of ²²⁷Ac, has a half-life of 22 minutes.[/ultimate_modal][/vc_column_inner][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9228|url^https://classhall.com/wp-content/uploads/2017/03/Ba.jpg|caption^null|alt^null|title^Ba|description^null” modal_title=”Ba” modal_on=”image” btn_img=”id^9228|url^https://classhall.com/wp-content/uploads/2017/03/Ba.jpg|caption^null|alt^null|title^Ba|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491150884236{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”]Radium is a chemical element with symbol Ra and atomic number 88. 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Francium is found in uranium minerals, and can be made artificially by bombarding thorium with protons. It is the most unstable of the first 101 elements. The longest lived isotope, ²²³Fr, a daughter of ²²⁷Ac, has a half-life of 22 minutes.[/ultimate_modal][/vc_column_inner][vc_column_inner width=”1/6″][ultimate_modal icon_type=”custom” icon_img=”id^9301|url^https://classhall.com/wp-content/uploads/2017/03/Ra.jpg|caption^null|alt^null|title^Ra|description^null” modal_title=”Radium” modal_on=”image” btn_img=”id^9301|url^https://classhall.com/wp-content/uploads/2017/03/Ra.jpg|caption^null|alt^null|title^Ra|description^null” modal_size=”medium” modal_style=”overlay-show-boxes” overlay_bg_color=”#003afc” overlay_bg_opacity=”80″ header_bg_color=”#e5e5e5″ modal_border_style=”solid” modal_border_width=”2″ modal_border_radius=”6″ css_modal_box=”.vc_custom_1491147377302{margin-right: -14.5px !important;margin-left: -14.5px !important;}” header_font_style=”font-weight:bold;” header_font_size=”desktop:20px;”]Radium is a chemical element with symbol Ra and atomic number 88. 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For elements with no stable isotopes, the mass number of the isotope with the longest half-life is in parentheses.

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