A dipositive ion has 20 protons. What is the number of electrons in its tetrapositive ion?

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Solution

The correct option is C 16
Di-positive means $+ 2$ charge and tetra-positive means $+ 4$ charge,

The original atom has $20$ electrons since the atomic number is 20 which is the number of protons.

So tetrapositive will have $20 - 4 = 16$ electrons.

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