Question

an atom of an element has 2 electrons in outermost M shell state the
atomic number
electronic configuration .
number of protons
valency
name of the element..

Answer 1

Since the element has 2 electrons in it s M shell, it’s

Atomic no : 12
Electronic configuration : 2,8,2
Number of protons : 12
Valency : 2
Name of the element : Magnesium

Answer 2

Atomic Nummber - 12

which is equals to number of electrons present in the shell of the atom.

Electronic Configuration - $1s^2 2s^2 2p^6 3s^2$

Number of protons would be 12.

Atomic number equals to the number of protons in an atom.

Valency: 2

charge on that particle will be equal to that of no of electrons in its outermost shell i.e. +2

Metal Name- MAGNESIUM(Mg)

If an atom has 2 electrons in its M shell then that means shell K has 2 electrons and shell L has 8 electrons that equals to 12 electrons which is of magnesium atom.

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