Question

Na or mg which has bigger atomic size and why

Answer 1

Answer:

Na has bigger atomic size

Explanation:

atomic size across the period decreases as for same no of shells, nuclear charge increases.

so distance between nucleus and valence electrons decreases across a period. hence Na has bigger radii than Mg.

Answer 2

Na has bigger because it is in left of Mg.

And size decrease as we go left to right in a period.