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:

(c) It has 18 vertical columns

known as Groups

Explanation:

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Answer 2

Answer:

c it as 18 vertical columns