Question

1. arrange the following elements in order from smallest radius to largest radius.

periodic table
smallest radius → largest radius
a b c
choices:
sn c ge

Explanation:

• Atomic radius trends: In the periodic table, atomic radius increases down a group and decreases across a period.
• For the elements \(C\), \(Ge\), and \(Sn\):
• \(C\) is in period 2, \(Ge\) is in period 4, and \(Sn\) is in period 5.
• As we move down the group (from \(C\) to \(Ge\) to \(Sn\)), the number of electron shells increases.
• With more electron shells, the atomic radius becomes larger.

Answer:

A. \(C\), B. \(Ge\), C. \(Sn\)