Question

A radiation of wave length 3000A°is required to remove an electron from a metal atom. If a radiation of wave length 2000A° is allowed to impact on the metal surface, the kinetic
energy of the emitted electron in KJ/mole is
1) 1.98x10^{2}
2) 3.3x10^{-19}
3) 3.3x10^{-20}
4) 19.8​

Answer 1

Explanation:

radiation of wave length 3000A°is required to remove an electron from a metal atom. If a radiation of wave length 2000A° is allowed to impact on the metal surface, the kinetic

energy of the emitted electron in KJ/mole is

1) 1.98x10^{2}

2) 3.3x10^{-19}

3) 3.3x10^{-20}