Question

In order to designate an orbital in an atom the no. of quantum no. required is:

• A. One
• B. Two
• C. Three
• D. Four

Answer 1

The correct option is C Three

• In order to designate an orbital in an atom the no. of quantum no. required is: $n,l,$, and $m$
• The principle (n), angular (l), and magnetic (m) quantum numbers. These quantum numbers describe the size, shape, and orientation in space of the orbitals on an atom. So $3$ quantum numbers are required, which are principle quantum number, Azimuthal quantum number, and Magnetic quantum number.

Option C is the correct answer.