Question

What is the general trend in atomic radius across a row of elements?

Answer 1

Decreases when going from Left to Right.

Explanation:

Across a raw in the periodic table (or a period), from left to right the size of atoms decreases.

The reason is that the effective nuclear charge increases due to the increase in the atomic number and therefore, the attraction toward the nucleus will be important and therefore, the size will be smaller.

`color(gray)("Image source: Zumdahl textbook")`