History, asked by mrsreshmas21, 2 months ago

which of the following always decrease down a group
a) 2nd period, 8th group
b) 3rd period, 8th group
c) 2nd period, 18th group
d) 3rd period, 18th group​

Answers

Answered by sherin8072
2

Answer:

c)2nd period, 18th group

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