How many elements are there in period 4 , 5 , 6 and 7?
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heyya mate here is ur ans.....⤵⤵
Period 4 -- 18
Period 4 -- 18Period 5--36
Period 4 -- 18Period 5--36Period 6--52
Period 4 -- 18Period 5--36Period 6--52Period 7--86✔✔✔
hope it helps☺☺
Tulsirani100:
But 6th period is longest
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2
Period 4 -- 18
Period 5--36
Period 6--52
Period 7--86
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