Chemistry, asked by abhsihekleo2006, 5 months ago

The elements A and B have electronic configuration 20 and 8 respectively. [2](i)To which periods A and B belong?(ii)To which group A and B belong?

Answers

Answered by anshgupta1817

0

Answer:

period 4 and 2

group 2 and 16

Explanation:

the elements are calcium and oxygen

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