Question

Which of the following is the correct symbol of an element?
1)SN
2)CO
3)CU
4)PB

Which of the following is configuration of electrons represent sodium?
1)2,8,4
2)2,8,5
3)2,8,3
4)2,8,1
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Answer 1

Answer:

1. All
2. 4) 2,8,1

MARK ME AS BRAINLIEST

Answer 2

question no 1 CO QUESTION NO 2 ,;4)2,8,1