Which one of the following is TRUE for a 3s orbital?

A) The possible values of *ml* for a 3s orbital are -1, 0, and +1.

B) A 3s orbital has 3 radial nodes.

C) The principal quantum number for a 3s orbital is 2.

D) A 3s orbital is shaped like a peanut.

E) The angular momentum quantum number *(l)* for a 3s orbital is 0.

We are being asked to **determine which of the given statements are TRUE for a 3s orbital.**

To solve this problem, let’s first **define and determine the possible values of the four quantum numbers**:

• **principal quantum number (n)**** ****→**** **energy level in orbitals and its value could be **any positive integer **starting from 1 to infinity.

• **angular momentum quantum number (ℓ)**** ****→ ****(l) has to be at least 1 less than n, **range of values from** 0 up to (n-1)**

▪ Each **ℓ value **corresponds to a **subshell**:

Introduction to Quantum Mechanics

Introduction to Quantum Mechanics

Introduction to Quantum Mechanics

Introduction to Quantum Mechanics

Introduction to Quantum Mechanics