HELP the following reaction is done in the lab: 2KI + Pb(NO3)2 --> Pbl2 + 2KNO3 will this reaction produce a precipitate? what is it?

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.

c, liquids evaporate, creating a gas

the answer is c

tell me if wrong