Question

electrons and the periodic table
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which statement describes the 3d, 4s, and 4p orbitals of arsenic (as) based on its electronic configuration and position in the periodic table?
the 3d and 4s orbitals are completely filled, and the 4p orbital is partially filled.
the 3d orbital is completely filled, and the 4s and 4p orbitals are partially filled.
the 3d, 4s, and 4p orbitals are completely filled.
the 3d, 4s, and 4p orbitals are partially filled.

Explanation:

$$1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^{10} 4p^3$$

Step3: Analyze orbital filling

• 4s: $4s^2$ (full, holds max 2)
• 3d: $3d^{10}$ (full, holds max 10)
• 4p: $4p^3$ (partial, holds max 6)

Answer:

$$1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^{10} 4p^3$$

Step3: Analyze orbital filling

• 4s: $4s^2$ (full, holds max 2)
• 3d: $3d^{10}$ (full, holds max 10)
• 4p: $4p^3$ (partial, holds max 6)