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Consider the two electron arrangements for neutral atoms A and B. What is the atomic number of A?

A - 1s2, 2s2, 2p6, 3s1
B - 1s2, 2s2, 2p6, 5s1

User Zetarun
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2 Answers

2 votes

Answer:

the atomic number is 11

Step-by-step explanation:

User GMichael
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1 vote

Answer:

A

Step-by-step explanation:

Because I am right

User Dsavickas
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