Question

Cu+ S2-
what name does that make an how do you solve it? is it CuS2 copper sulfide?

Answer 1

When you have an element with different ions, you have to specify with Roman numerals which ion you're using when naming it. Copper has multiple charges, so you will have to specify which ion of copper you're using: Cu^+ is copper(I) and Cu^2+ is copper(II)

copper(I) has a charge of 1+. Sulfur has a charge of 2-. You need one more positive ion to cancel out the negative, so the answer is Cu2S

Answer 2

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