Year: 2024
Topic: Structure of Atom
Time :
1.
The energy of an electron in the ground state (n = 1) for \(\text{He}^+\) ion is \(-x\text{J}\), then that for an electron in n = 2 state for \(\text{Be}^{3+}\) ion in J is:
(1). \(\displaystyle-\,4x\)
(2). \(\displaystyle-\,\frac{4}{9}x\)
(3). \(\displaystyle-\,x\)
(4). \(\displaystyle-\,\frac{x}{9}\)