How many electrons are present in the orbital having n=1, l=0, m=0?
Correct answer: B. 2
- A. 3
- B. 2
- C. 4
- D. 5
Explanation
Any orbital can hold a maximum of 2 electrons with opposite spin. The first shell has one 1s orbital and holds 2 electrons. The second shell holds 8 electrons; 2 in a 2s orbital and 6 in three 2p orbitals. The third shell holds 18 electrons; 2 in a 3s orbital; 6 in three 3p orbitals; and 10 in five 3d orbitals.
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