How many elements are there in the first second third and fourth periods?
Answers
Answered by
36
first period contains two elements
second period contains eight elements
third period contains eight elements
fourth period contains eighteen elements
second period contains eight elements
third period contains eight elements
fourth period contains eighteen elements
Answered by
12
Answer:In frst period
2×1^2=2
Second period
2×2^2=8
Third
2×3^2=18
Fourth
2×4^2=32
Step-by-step explanation:
Similar questions