The quantum number n is the main thing. It determines the energy of an electron in an atom. n takes values from 1 to ∞.
The orbital quantum number l characterizes the shape of the orbitals and takes values from 0 to n - 1.
The quantum number m is called magnetic. It determines the spatial arrangement of the atomic orbitals and takes integer values from -l to +l through zero, that is, 2l + 1 values.
Proceeding from this, the correct entries are:
n = 1, l = 0, m = 0;
n = 3, l = 0, m = 0;
n = 5, l = 4, m = –3.
Answer: n = 1, l = 0, m = 0;
n = 3, l = 0, m = 0;
n = 5, l = 4, m = –3.
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