Question

why the size of Mg+2 is less than Mg​

Answer 1

Answer:

The size of the cation is small then their neutral atom because it has less number of electrons while its nuclear charge remains the same. So, the nucleus attracts the electron more towards itself and leads to the decrease in size. Hence, magnesium metal has larger than its respective ion

Explanation:

Answer 2

Answer:

The size of Mg+2 is less than Mg because of the Effective nuclear Force,

Mg have 12 elctrons so it have a greater sheilding effect meanwhile Mg+2 have only 10 electron so The nucleus holds the electron more strongly thus smaller in length

Q. What is shielding effect ?

ans> The shielding effect sometimes referred to as atomic shielding or electron shielding describes the attraction between an electron and the nucleus in any atom with more than one electron.