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?
How many protons are in the nuclei of the neutral atoms of X and Y respectively?
-
A.
10 and 10 -
B.
9 and 9 -
C.
11 and 9 -
D.
9 and 11
Correct Answer: Option 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