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Chemistry, 21.03.2020 00:32 silvernekoo

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

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