In an atom the ratio of radius of orbit of electron to the radius of nucleus is

Question

In an atom the ratio of radius of orbit of electron to the radius of nucleus is (A) 103 (B) 104 (C) 105 (D) 106

Tardigrade Admin · Accepted Answer

The radius of orbit of electrons = 10-10 m radius of nucleus = 10-15 m ∴ Ratio = (10-10/10-15) = 105 Hence the radius of electron orbit is 105 times larger than the radius of nucleus.

Q. In an atom the ratio of radius of orbit of electron to the radius of nucleus is

$1 0^{3}$

$1 0^{4}$

$1 0^{5}$

$1 0^{6}$

The radius of orbit of electrons $= 1 0^{- 10} m$
radius of nucleus $= 1 0^{- 15} m$
$∴$ Ratio $= \frac{1 0 ^{- 10}}{1 0 ^{- 15}} = 1 0^{5}$
Hence the radius of electron orbit is $1 0^{5}$ times larger than the radius of nucleus.