Question

The horizontal rows in modern periodic table are called _____
(a) group (b) periods (c) tables (d) none of this ​

Answer 1

Answer:

The horizontal rows in the periodic table are periods, while the vertical rows are called groups.

Explanation:

b) periods

Answer 2

Answer:

(a) group

Explanation:

The horizontal rows in the periodic table are periods, while the vertical rows are called groups.

This is your answer.

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