2 Answers

Blake Niemyjski · Answer 1 · 2017-05-21T04:46:24+0000

Hydrogen's period number is 1. It is the first element on the periodic table it has 1 valence electron, it's chemical symbol is H and is group number is 1.

Tmoschou · Answer 2 · 2017-05-24T12:22:15+0000

Period number is 1. It's group number also is 1. Hydrogen is a non-metal, yet happens to be on the metal side since it has that many valence electrons.

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