When Silver Chloride is exposed to light it splits

When Silver Chloride is exposed to light it splits into silver metal and chlorine gas.Therefore, it is a decomposition reaction.

Explanation:

The chemical reaction is called as decomposition reaction.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

a electronegativity decreases beacuse the size of nucleus is bigger.