5. Before becoming ions, the sodium atom is ( larger / smaller ) than the chlorine atom. 6. Sodium ( gains / loses ) an electron. This gives it a (positive/negative ) charge.

7. Chlorine ( gains / loses ) an electron. This gives it a ( positive / negative ) charge.

Larger

Loses, positive

gains, negative

Explanation:

5. Before becoming ions, the sodium atom is larger than the chlorine atom. This is because, generally metals have a greater atomic radius compared to non - metals.

Also, as one moves from left to right across the period, the atomic radius reduces.

Chlorine is to right on the periodic table and Sodium is to the left.

6/7;

When a neutral atom gains electrons, it becomes negatively charged. This is because the number of electrons in the atom becomes more than the number of protons.

This is the case with the sodium. As it loses electrons, it becomes positively charged.

The reverse is the case when chlorine gains electrons to become negatively charged.

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