Question

What is the total number of orbitals in the third energy level (n = 3)?

• A. 9
• B. 16
• C. 4
• D. 3

Hint:

Remember: The number of orbitals in each energy level increases with the square of the principal quantum number \( n \). The formula is \( n^2 \).

Answer 1

The Correct Option is A

Step 1: Recall the formula for the number of orbitals in a given energy level The total number of orbitals in an energy level \( n \) is given by: \[ \text{Total orbitals} = n^2 \] Step 2: Apply the formula for the third energy level (n = 3) For \( n = 3 \), the total number of orbitals is: \[ \text{Total orbitals} = 3^2 = 9 \] Answer: Therefore, the total number of orbitals in the third energy level is 9. So, the correct answer is option (1).