1) are the chemical elements found in Group 1 of the periodic table. a) hydrogen b) electron c) alkali metals d) element 2) How many valence electron does group 1 have ? a) 10 b) 5 c) 20 d) 1 3) How do group 1 elements react with hydrogen? a) Alkali metals react with hydrogen to form ionic hydries. b) it depends on thier atomic mass c) because it has certain properties of group I elements.

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