Question

Which of the following is correct about the statement-"Two electrons with the same n, $l$, and $m_l$ values"?

• A. Must be in different atoms
• B. Are in different orbitals of the same subshell
• C. Are in the same orbital of the same subshell with opposite spins
• D. Are indistinguishable from each other
• E. None of the above

Answer 1

Answer: (C)

Are in the same orbital of the same subshell with opposite spins

Value of $n$ shows the shell in which electrons are present.
Value of $l$ shows the subshell in which electrons are present.
Value of $m_l$ shows the orbital of that particular subshell in which electrons are present.
As two electrons may be present in any orbital, in maximum number, but can not have same spin.
Hence, here "Two electrons with the same $n,l,m_l$ values must present in the same orbital of the same subshell with opposite spins"