Question

The electron in a given Bohr orbit has a total energy of -1.5eV. Calculate

its kinetic energy?​

Answer 1

Answer:

Potential Energy, PE=−kZe

2

/r, whereas KE=1/2×mv

2

.

According to Bohr's Model, mv

2

/r=kZe

2

/r

2

, therefore 1/2×mv

2

=kZe

2

/2r.

KE=−PE/2.

TotalEnergy=−4.9

K.E+PotentialEnergy=TotalEnergy

K.E=4.9ev=(−totalEnergy)

P.E=2[totalEnergy]=−9.8ev