1. barium (ba) is larger than magnesium (mg) because barium appears below magnesium on the periodic table. explain why barium (ba) is larger than magnesium (mg).

2. when it ionizes, sodium (na) becomes na+

does sodium lose an electron or gain an electron during ionization?

explain why

which has a bigger atomic radius: na of na+

use the periodic table and your knowledge of atomic structure to explain how you know whether the neutral atom or ion is bigger.

The answer to your question is below

Explanation:

1.- Barium and magnesium are in different periods, Barium is in period 6 and magnesium is in period 3. This means that Barium has 3 more levels of energy than magnesium. Both metals have the same valence number but the electronic configuration of Magnesium is [Ne] 3s2 and from Barium is [Xe]6s2.  

2.- Yes, that is correct. Sodium loses 1 electron when it ionizes. Then its ion is Na+1.

Atoms become stable when they acquire 8 electrons in their outermost shell, so, sodium acquires 8 electrons when it loses electrons.

3.- Neutral Sodium is bigger than its ion because it has one more shell.

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