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Chemistry, 19.03.2020 20:30 kimjooin02

Which electron configurations represent the first two elements in Group 17 (7A) of the Periodic Table?
A
1s22s1 and 1s22s2

B
1s22s22p6 and [Ne]3s23p5

C
1s22s22p5 and [Ne]3s23p5

D
1s22s2 and 1s22s22p1

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