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4 Cards in this Set
- Front
- Back
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hydrogen
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atomic number 1
its a gas it can be compressed 1 valence electron the most abundant in the universe. |
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helium
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one of the noble gases
its unreactive and colorless its used in air balloons atomic number 2 it has eight valence electrons |
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lithium
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atomic number 3
it has 1 valence electron its a alkaline metal its used in batteries also used in medicine. atomic weight is 6.941 |
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beryllium
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atomic number 4
its a metal also has a high melting point its very toxic the symbol is Be its small in size it is part of the alkaline earth metals it has two valence electrons |
