What are the first two quantum numbers for the electrons located in subshell 4d?

Answer: n = 4, l=2

Explanation:

Principle Quantum Numbers: This quantum number describes the size of the orbital. It is represented by n. n = 1,2,3,4 ...

Azimuthal Quantum Number: This quantum number describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1). For l = 0,1,2,3 ... the orbitals are s, p, d, f ...

For the given symbol 4d, 4 denotes the principle quantum number and means the electron is present in 4th main energy level. d represents azimuthal quantum number and for d subshell which stands for diffused shape of the subshell, value of l = 2.

n = 4, l = 2

Explanation:

The number 4 in 4d is the principal quantum number (n).

The letter d in 4d tells us that we have a d orbital, as determined by the secondary quantum number (l).

The quantum number l tells us the shape of the orbital.

l = 0 s orbital

l = 1 p orbital

l = 2 d orbital