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The ions X- and Y+ are isoelectronic, each containing a total of 10 electrons.Ho...


Question

The ions X- and Y+ are isoelectronic, each containing a total of 10 electrons.

How many protons are in the nuclei of the neutral atoms of X and Y respectively?

Options

A) 10 and 10

B) 9 and 9

C) 11 and 9

D) 9 and 11


The correct answer is D.

Explanation:

X- means one excess electron, hence 9 protons while Y +/- means one deficit electron hence 11 protons X and Y = 9 and 11

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