what are the horizontal rows on the periodic table called?\nlevels\nperiods\nfamilies\nblocks\nquestion 8 (1…

Brief Explanations:

In the periodic table, horizontal rows are known as periods. Each period number corresponds to the principal energy level that the out - most electrons of the elements in that period occupy. Also, the number of protons defines the identity of an element, so all atoms of the same element have the same number of protons.

Answer:

What are the horizontal rows on the periodic table called? B. Periods Question 8 (1 point) True