Identify the correct values for a 1s orbital. A) n = 3, l = 1, m_l = +1 B) n = 2, l = 1, m_l = 0 C) n = 1, l = 0, m_l = 0 D) n = 2, l = 0, m_l = -1 E) n = 4, l = 1, m_l = -2

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The values for a 1s orbital are n = 1, l = 0, and mS = +1/2 or -1/2. Option C is the only one that has the correct values for n and l, and the mS value is not given but can be assumed to be either +1/2 or -1/2 (since there is only one electron in a 1s orbital and it must have opposite spin to the other electron in the same orbital in a multi-electron atom). The other options have incorrect values for either n, l, or both.

Identify the Correct Values for a 1s Orbital