Q157 / 160 · AP EAMCET 2022 (08 Jul Shift 2) · Physics

The following parameter is same for all hydrogen like atoms and ions in their ground state.

A
Radius of the orbit
B
Speed of the electron
C
Energy of the atom
Correct answer
D
Orbital angular momentum of the electron.

Solution

According to Bohr's postulate angular momentum of electron in an hydrogen atom or hydrogen like ion is $L_1=\frac{n h}{2 \pi}$ As $\frac{h}{2 \pi}=$ constant, angular momentum depends only on $n$ and its value is same when $n=1$ for all electrons.

Hence, the correct answer is option: 'D'.

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