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What element has its 7 valence electrons in energy level 4 in s and p orbitals?
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What element has its 7 valence electrons in energy level 4 in s and p orbitals?

User Abaza
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The answer to your question is the element (Br) because it has 35 in his atomic number.
1s2/2s2 2p6/ 3s2 3p6/4s2 4p6 3d9. or [Ar] 4s2 2p5 3d10.
i hope that is answering your question.
User Huzeyfe
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