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5 votes
Which of the following is the correct chemical formula for Na and S?

Na2S
NaS2
NaS

User Kamni
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2 Answers

5 votes
Na2S is your answer.
User Qi Zhang
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8.2k points
3 votes
Na2S because Na is 1 away from its noble gas giving it a positive 1 charge. S is two away from its noble gas so it is given a negative 2 charge. You need two Na so that they will cancel with the negative 2 charge.
User Amachado
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8.2k points