Q. 615.0( 2 Votes )
If the number of protons in one atom of an element Y is 20, then the number of electrons in its ion Y2+ will be: A. 20
B. 19
C. 18
D. 16
Answer :
When the number of protons in one atom of an element Y is 20, then the number of electrons in its ion Y2+ will be 18.
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