Question

The velocity of electron in hydrogen atom is 7.29*10^7 cm/s.what is the total energy of that electron

Answer 1

there fore,, the energy of the electron =
${10}^{ - 21} \times 242.0713$

Answer 2

Answer:

The total energy of the electron is $2.4\times10^{-19}\ J$

Explanation:

Given that,

The velocity of electron$v = 7.29\times10^{7}\ cm/s$

Kinetic energy :

The kinetic energy is equal to the half of the product of mass and square of velocity.

The total energy of the electron is defined as,

$K.E=\dfrac{1}{2}mv^2$

Where, m =  mass of hydrogen atom

v = velocity of electron in hydrogen atom

Put the value into the formula

$K.E=\dfrac{1}{2}\times9\times10^{-31}\times(7.29\times10^{5})^2$

$K.E=2.4\times10^{-19}\ J$

Hence, The total energy of the electron is $2.4\times10^{-19}\ J$