Match each set of energy sublevels to the principal energy level that contains them.

S sublevel

S and p sublevel

S, p, and d sublevel

Third energy level

First energy level

Second energy level

Each additional energy level contains one more sublevel then the energy level below it.

Therefore the first energy level contains only the s sublevel, the second contains s and p, the third contains s, p, and d, and so on.

Answer: s sublevel : First energy level

s and p sublevel: Second energy level

s, p, and d sublevel: Third energy level

Explanation:

Principle Quantum Numbers : It describes the size of the orbital and the energy level. It is represented by n. Where, n = 1,2,3,4 ...

Azimuthal Quantum Number : It 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 ...

1. For n = 1, first energy level

n = 1, l can have value 0 to (n-1) i. e. 0 only. Thus l can have only one value of zero which corresponds to s sublevel.

2. For n = 2, second energy level

n=2, l can have value 0 to (n-1) i. e. 0 and 1 only. l = 0 corresponds to s sublevel and l = 1 corresponds to p sublevel.

3. For n = 3, third energy level

n=3, l can have value 0 to (n-1) i. e. 0,1 and 2 only. l = 0 corresponds to s sublevel, l = 1 corresponds to p sublevel and l = 2 corresponds to d sublevel.