The radius of the first Bohr orbit in hydrogen atom is $r_{0}$ then the radius of first orbit in helium atom will be

2 r_{0}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

4 r_{0}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

\frac{r_{0}}{2}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

r_{0}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $\frac{r_{0}}{2}$
Radius of first orbit, $r_{n} = k / Z$ where $k = 0.529$ $A^{o}$
For Hydrogen atom, $r_{o} = k / 1 = k$ $(Z = 1)$
For Helium atom, $r = k / 2$ $(Z = 2)$
$⟹$ $r = \frac{r_{o}}{2}$

Suggest Corrections

Similar questions

r_{0}

E_{0}

r_{0}

r_{0}

r_{0}

r_{0}

H -

V (r) = V_{0} l n (\frac{r}{r_{0}})

V_{0}, r_{0}

r_{n}

n t h

Join BYJU'S Learning Program