Eric Nicholas K's answer to Ria's Secondary 3 Biology Singapore question.
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The first step in doing this question is to identify the charges on X and Y.
Since X has lost two electrons, its charge is 2+. Since Y has gained one electron, its charge is 1-.
To counteract the 2+ charge, we need a 2- charge. But Y only has a charge of 1-, so we need two of Y to balance out the charges in one of X.
So the formula is XY2.
Since X has lost two electrons, its charge is 2+. Since Y has gained one electron, its charge is 1-.
To counteract the 2+ charge, we need a 2- charge. But Y only has a charge of 1-, so we need two of Y to balance out the charges in one of X.
So the formula is XY2.
Date Posted:
4 years ago
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