Question

nple Question Papers
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.
O n
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Answer 1

Answer:

a b correct............

Explanation:

a b correct

Answer 2

Answer:

C

Explanation:

There are 18 vertical columns known as groups and 7 horizontal rows known as periods in Modern periodic table.