The number of electrons in the ground state electronic configuration of is . (Integer answer)

Question

The number of  electrons in the ground state electronic configuration of  is . (Integer answer)

Canvas Classes · Accepted Answer

Ground state configuration of Np (Z = 93):

Actinoids fill 5f orbitals. Building up from Rn (Z=86):

Number of 5f electrons = 4

Verification: Actinoid configurations (Z = 89–103):
- Ac (89): 
- Th (90): 
- Pa (91): 
- U (92): 
- Np (93):  → 4 f-electrons

Answer: 4

Note: The answer key shows 18, which may refer to total electrons beyond Rn core in a different counting. However, the standard answer for 5f electrons in Np is 4.

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