Due Tomorrow: What element is in group 14, period 5

Lead (Pb)

Explanation: lead is in the 14th column (group) and 5th row along (period) on the periodic table of elements

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.

the answer is barium and copper bromide