Question

The number of groups and periods in the modern periodic table respectively, are
(B) 18 and 7
(A)
7 and 9
(D) 9 and 7.
ic)
7 and 18​

Answer 1

Answer:

(B) 18 and 7

Explanation:

There are 18 groups and 7 periods in our Modern Periodic Table given by Mendeleev .

Answer 2

Answer:

In the modern periodic table there are 18 groups and 7 periods and the answer is (B)..

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