2 (it’s a d-orbital)
the orbital shown is d orbital.
ℓ = 2
The value of ℓ ranges from 0 to n − 1.
This is because the first p orbital (ℓ = 1) appears in the second electron shell (n = 2), the first d orbital (ℓ = 2) appears in the third shell (n = 3), and so on.
Also, for easy reference, remember this:
for s, value of l =0;
for p, value of l =1;
for d, value of l =2;
for f, value of l =3;
and so on…..