1. For the fourth energy level (n=4), the maximum number of electron is 2(4)2, or 32.

  2. For the fifth energy level (n=5), the maximum number of electron is 2(5)2, or 50.

  3. For the sixth energy level (n=6), the maximum number of electron is 2(6)2, or 72.

  4. For the seventh energy level (n=7), the maximum number of electron is 2(7)2, or 98.