What is the maximum number of electrons that can occupy the 3rd energy level?

What is the maximum number of electrons that can occupy the 3rd energy level?

Step 1: Understand that energy levels in an atom are numbered starting from 1. The first energy level is n=1, the second is n=2, and the third is n=3.
Step 2: Know the formula to find the maximum number of electrons in an energy level, which is 2n^2.
Step 3: Identify the value of n for the third energy level, which is n=3.
Step 4: Substitute n=3 into the formula: 2(3^2).
Step 5: Calculate 3^2, which is 9.
Step 6: Multiply 2 by 9 to get 18.
Step 7: Conclude that the maximum number of electrons that can occupy the 3rd energy level is 18.

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