Question

which is larger Mg or Mg2+. explain

Answer 1

The main concept is that when electrons decrease in an atom then nucleus capacity to hold electrons increases and they come closer to the nucleus or nucleon
So Mg atom will be larger as it has more electrons than Mg 2+ and thus will have larger atomic radii.
Hope you understand the solution

Answer 2

Answer: Magnesium metal has larger than its respective ion.

Explanation:

Atomic radius of an atom is defined as the total distance from the nucleus to the outermost shell of the atom.

An ion is formed when a neutral atom looses or gains electrons.

• When an atom looses electrons, it results in the formation of positive ion known as cation.
• When an atom gains electrons, it results in the formation of negative ion known as anion.

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.