Question

In a period, the atom with smaller and larger radius
are​

Answer 1

Answer:

Here's Your Answer

Explanation:

●As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period.

●Thus, helium is the smallest element, and francium is the largest.

●The valence electrons are therefore held more tightly, and the size of the atom contracts across a period.