True or false: orbital energies

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   In hydrogen, all orbitals in a given shell have the same energy.

2. Statement is true

   Yes

   Statement

   He⁺ and Li²⁺ behave like hydrogen in this respect.

3. Statement is true

   Yes

   Statement

   In a multi-electron atom, orbital energy depends on n and l.

4. Statement is true

   No

   Statement

   A higher (n + l) value means lower energy.

5. Statement is true

   Yes

   Statement

   For equal (n + l), the lower n has the lower energy.

Explanation