Answers

2016-03-05T14:05:44+05:30
H2S (HYDROGEN SULPHIDE)

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what?
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hmmm
ts very simple question
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  • Brainly User
2016-03-05T14:09:04+05:30
Third period means the element contains 3 shells that is K,L,M Shells.
Group 16 means having 6 electrons in valence shell.That is Sulphur.
Molecular formula of sulphur reacting with hydrogen will be.
Hydrogen's valency-1
Sulphur's valency-2(2,8,6 so 8-6=2)
Formula will be H2S
(Interchange their valencies)

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