Question

what are the horizontal rows on the periodic table called? levels periods families blocks question 8 (1 point) all atoms of the same element have the same number of protons. true false

Explanation:

In the periodic table, horizontal rows are called periods. Elements in a period have the same number of electron - shell levels. Also, all atoms of the same element have the same number of protons, which is the defining characteristic of an element.

Answer:

1. B. Periods
2. True