Question

Which of the following parameters are same for all hydrogen like atoms and ions in their ground state?

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

Answer 1

The correct option is D Orbital angular momentum of electron

As we know,
$r\propto n^2$
$E\propto -Z^2/n^2$
$v\propto Z/n$
$mur=\frac{nh}{2\pi },$ i.e., independent of $Z$ so it will remain same.