Question

1. what are horizontal rows in the periodic table called? (0.5 points) * enter your answer

Explanation:

In the periodic table, the horizontal rows are a fundamental concept in chemistry. Each row represents a period. As we move across a period from left to right, the atomic number of the elements increases by 1. The properties of elements in a period show a gradual change. For example, in period 3 (sodium to argon), the metallic character decreases from left to right.

Answer:

Periods