Which of these elements has two electrons in its outer p orbitals? A. helium (He) B. barium (Ba) C. nitrogen (N) D. silicon (Si) E. sulfur (S)

D. Silicon

Explanation:

A) Atomic number of He = 4

Valence Electron configuration = 1s²

B) Atomic number of Ba = 56

Valence Electron configuration = 6s²

C) Atomic number of N = 7

Valence Electron configuration = 2s²2p³

D) Atomic number of Si = 14

Valence Electron configuration = 3s²3p²

E) Atomic number of S = 16

Valence Electron configuration = 3s²3p⁴

Thus, silicon has 2 electrons in its outer p orbitals

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Your Question:

Which of these elements has two electrons in its outer p orbitals? A. helium (He) B. barium (Ba) C. nitrogen (N) D. silicon (Si) E. sulfur (S)

Answer:

A. helium (He)

The reason its helium is because helium has 2 electrons.