Question

Which of the following statements about the modern periodic table is correct.

a. It has 18 horizontal rows known as periods

b. It has 7 vertical columns known as periods

c. It has 18 vertical columns known as groups

d. It has 7 horizontal rows known as groups​

Answer 1

Answer:

option c. is correct

Explanation:

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Answer 2

Answer:

option a and b is correct I am thinking friend

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if I said wrong I am sorry my dear friend

Explanation:

Because any periodic table has 18 horizontal rows periods and 7 verticals columns known as groups I am thinking please I am sorry if I told wrong as I correct means make me a brilianist friend