Question

part a
which of the atoms represented below is the smallest in size?
ge
pb
si
sn
c

Explanation:

Atomic size (atomic radius) decreases across a period (from left to right) and increases down a group in the periodic table. These elements (Ge - Germanium, Pb - Lead, Si - Silicon, Sn - Tin, C - Carbon) are in Group 14. Carbon (C) is in Period 2, Silicon (Si) in Period 3, Germanium (Ge) in Period 4, Tin (Sn) in Period 5, and Lead (Pb) in Period 6. As we move down a group, the number of electron shells increases, leading to an increase in atomic size. So the element with the fewest electron shells (lowest period number) will be the smallest.

Answer:

C. C