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The number of electrons in a di-positive...

The number of electrons in a di-positive ion of an element X is 18. If the mass number of X is 4 units more than twice the number of electrons of its ion, calculate of protons , electron and neutrons in X.

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(a) Number of electrons in the corresponding neutral atom
(b) Calculation of mass number
(c) Calculation of number of neutrons from mass number and atomic number
(d) 20,20,20
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