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Hydrogen is a special element because it does not belong to any family. On the periodic table, hydrogen is listed at the top of group one, which contains all alkali metals, but it is not associated with the rest of those... More »

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When French scientist Antoine Lavoisier discovered that hydrogen was a necessary component in water in 1783, he named the element "hydrogen," derived from the Greek words "hydro" and "genes." Together, these two Greek wo... More »

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Although hydrogen is normally listed at the top of Group I, the alkaline metals, on the periodic table, there is much debate as to which group it should belong. Many chemists believe hydrogen doesn't belong in any group ... More »

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Oxygen is an element that is found in period two and group 16 on the periodic table of elements. It has an atomic number of 8 and a rounded atomic weight of 16, meaning that the element has eight protons, eight electrons... More »

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A neutral atom containing 12 protons is of the element magnesium. If the atom had a positive or negative charge, it would still be of the element magnesium; however, it would then be classified as an ion. More »

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A material that contains only one type of atom is called an element. There are 98 elements known to occur naturally, along with another 20 that have been synthesized in laboratories, as of 2015. Hydrogen, the lightest el... More »

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Hydrogen is the only element that does not contain any neutrons in its nucleus. Hydrogen is comprised of one proton and one electron. It is a diatomic molecule, which means that it typically exists as two hydrogen atoms ... More »

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