Electron configuration of ion
Chemistry
Level
pending
The above is the electron configuration of a stable ion of an arbitrary atom X. Which of the following statements is correct?
X is an atom in the 2nd period.
The number of protons of the atom X is 10.
The atomic radius of X is greater than the ionic radius.
The valence electron number of X is 3.
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1 solution
The atomic number is 12-Magnesium; It has 3 shells:Configuration:2,8,2; While this has two shells. So answer is B