Which species is NOT hydrogen-like

1. A.
   $\text{He}$
2. B.
   $\text{He}^+$
3. C.
   $\text{Li}^{2+}$
4. D.
   $\text{Be}^{3+}$

Tap an option to check your answer.

1. A.
   ${Li}^{+ 2}$
2. B.
   ${Be}^{+ 3}$
3. C.
   ${Li}^{+}$
4. D.
   ${He}^{+}$

Tap an option to check your answer.