Question

3. Which of the following statement about the
Modern Periodic Table is correct.
(a) It has 18 horizontal rows known as periods .
(d) it has 7 vertical columns known as periods
(c) It has 18 vertical columns known as group.
(d) it has 7 horizontal rows known as groups.
​

Answer 1

Answer:

I hope c option is correct answer

Answer 2

Answer:

It has 18 vertical columns known as group

Explanation:

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