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It is not found as a free element in nature; it is often found in minerals in combination with iron.

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It is a nonmetal with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium.

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It is a member of the actinide and transuranium element series

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A radioactive actinide metal, neptunium is the first transuranic element.

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It is the first element in group 12 of the periodic table.

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It is a post-transition metal in group 14 of the periodic table. It is obtained chiefly from the mineral cassiterite, which contains tin dioxide, SnO₂.

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It is a lustrous transition metal with a silver color, low density, and high strength.

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When freshly cut, it is bluish-white; it tarnishes to a dull gray upon exposure to air. It is a soft, malleable, and heavy metal with a density exceeding that of most common materials

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. It is a silvery-white metal in the actinide series of the periodic table.

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It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized

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It is a metal in the first transition series.

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It is commonly known as quicksilver and was formerly named hydrargyrum.

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In its purest form, it is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal

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It was first isolated from potash, the ashes of plants, from which its name derives.

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It can supply the body with calcium if the regular diet does not provide enough.

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It is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions

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A freshly exposed surface of pure copper has a reddish-orange color

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Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air.

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It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772.

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H - Hydrogen - Atomic                   Number 1

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H - Hydrogen - Atomic                   Number 1

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Hydrogen is present` in all organic compounds