If a dipositive ion has an electronic configuration of 2, 8, then the number of electrons in that ion is:

Q. Assertion: Sodium Metal is reactive where as Sodium Ions aren't reactive.

Reason: Sodium Metal has an electronic configuration of 2, 8, 1. Sodium Ions have a configuration of 2, 8.

Q. Assertion [A]: Sodium metal is reactive, whereas sodium ions are not.

Reason [R]: Sodium metal has an electronic configuration of 2, 8, 1 and sodium ions have a configuration of 2, 8.

Q. A dipositive ion has an electronic arrangement $2,8,8$. Find out the number of electrons, protons and neutrons in that element if its mass number is $40$.

Q. The electronic configuration of an ion $M^{2+}$ is 2, 8, 14. If its mass 56, the number of neutrons in its nucleus is :

Q. An ion has electronic configuration $\left[Kr\right]4d^4$ placed in group 6 in the modern periodic table. The ion is: