Question

As you move from row ______ to row ______ in the periodic table, the atomic radius of the elements DECREASES.

A) 1 to 7
B) 1 to 18
C) 7 to 1
D) 18 to 1

Answer 1

C) 7 to 1

Step-by-step explanation:

The periodic trend of Atomic Radii for the Periodic Table of Elements is down and to the left the atomic radii increases.

So, from period 1 to 7 and group 18 to group 1, the atomic radii increases.

The opposite (decreasing) would be from period 7 to 1 and group 1 to group 18.

Therefore, our answer is C.