Question

Which set of quantum numbers (n, l, m, s) represents the outermost electron in a gaseous aluminium atom?

A. 2,1,0.+1/2
B. 2,1,−1.+1/2
C. 3,0,0.+1/2
D. 3,1,−1.+1/2

Answer 1

The outermost electron in a gaseous aluminium atom has the quantum numbers 3, 0, 0, +1/2. The correct answer is option C.

Step-by-step explanation:

A number that can only have specific integral or half-integral values and appears in the theoretical expression for the value of a quantized property of an atom, molecule, or subatomic particle. The set of quantum numbers (n, l, m, s) that represents the outermost electron in a gaseous aluminium atom is option C.

3, 0, 0, +1/2. The quantum numbers represent specific properties of the electron. The principal quantum number (n) represents the energy level or shell.The azimuthal quantum number (l) represents the subshell or orbital type, the magnetic quantum number (m) represents the orientation of the orbital.

The spin quantum number (s) represents the spin state of the electron. In this case, the outermost electron in aluminium is in the 3s orbital, which corresponds to the quantum numbers 3, 0, 0, +1/2.