Math  /  Word Problems

QuestionIdentify the element X\mathrm{X} if the ion X2\mathrm{X}^{2-} has 18 electrons and a -2 charge.

Studdy Solution
Look up the element with atomic number20 in the periodic table.The element with atomic number20 is Calcium (Ca).
So, X\mathrm{X} is Calcium (Ca).

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