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For a neutral atom with the electron configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d6 (Iron - ²⁶FE), what is the valence electron of an element?

A. 1
B. 2
C. 3
D. 4​

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Answer:

For a neutral atom with the electron configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d6 (Iron - ²⁶FE), what is the valence electron of an element?

A. 1

B. 2

C. 3

D. 4

Explanation:

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