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The top documents tagged [element group]
S ix
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Chapter 14: Chemical Periodicity
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Elements Hydrogen Number of: Protons 1 Neutrons 0 Electrons 1 Boiling point -252 Freezing point -259 State at room temperature gas
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Elements Hydrogen Brief description: hydrogen is the lightest element. It is by far the most abundant element in the universe and makes up about about
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