Problem: What is the correct formula for the compound formed between calcium and sulfur? a) CaSb) Ca2S c) CaS2d) CaS3

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calcium (metal) + sulfur (nonmetal) → ionic compound

calcium → group 2A → +2 charge → Ca2+

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Problem Details

What is the correct formula for the compound formed between calcium and sulfur? 

a) CaS

b) Ca2

c) CaS2

d) CaS3

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What scientific concept do you need to know in order to solve this problem?

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Based on our data, we think this problem is relevant for Professor Magtoto's class at TCC.