# physics

In the Bohr model of the atom, the ground-state electron in hydrogen has an orbital speed of 2190 km/s.The mass of an electron is 9.11×10−31kg. What is its kinetic energy?

1. 👍 0
2. 👎 0
3. 👁 447
1. what is 1/2 mass*velocity^2 ?
change km/s to m/s

1. 👍 1
2. 👎 0
2. 13,6ev

1. 👍 0
2. 👎 0
posted by Leo

## Similar Questions

1. ### physics

The radius of circular electron orbits in the Bohr model of the hydrogen atom are given by (5.29 ✕ 10^−11 m)n^2, where n is the electron's energy level (see figure below). The speed of the electron in each energy level is

asked by joy on February 16, 2018
2. ### Physics

Could someone help me with these questions. . . please 1. How does Rutherford’s model of the atom account for the back – scattering of alpha particles directed at the gold leaf 2. The higher the energy level occupied by an

asked by Mike on November 12, 2007
3. ### physics

The radius of circular electron orbits in the Bohr model of the hydrogen atom are given by (5.29 ✕ 10−11 m)n2, where n is the electron's energy level (see figure below). The speed of the electron in each energy level is

asked by joy on February 9, 2018
4. ### physics

The radius of circular electron orbits in the Bohr model of the hydrogen atom are given by (5.29 ✕ 10−11 m)n2, where n is the electron's energy level (see figure below). The speed of the electron in each energy level is

asked by joy on February 9, 2018
5. ### Physics

Q: From the Bohr model of the Hydrogen atom, calculate the minimum amount of energy (in eV) an electron in the lowest orbital would need to free it from its proton (i.e., to ionize the atom). A: would I use the equation: En = -

asked by Tracey on May 26, 2009
6. ### Physics/electricity

In the Bohr model of the hydrogen atom, an electron in the 2nd excited state moves at a speed of 5.48X10^5 m/s in a circular path having a radius of 2.12X10^-10 m. What is the effective current associated with this orbiting

asked by Derrick on October 6, 2013
7. ### Physics

A hydrogen atom is in its third excited state (n=4). Using Bohr theory of the atom calculate (a) the radius of the orbit, (b) the linear momentum of the electron, (c) the angular momentum of the electron (d) the kinetic energy (e)

asked by Chi on April 28, 2012

Consider two different hydrogen atoms. The electron in each atom is in an excited state. (a) Is it possible for the electrons to have different energies but the same orbital angular momentum L, according to the Bohr model?

asked by Mary on December 14, 2007
9. ### College Physics

the electron in a hydrogen atom can, according to the Bohr atomic model, be regarded as moving at constant speed in a circular orbit of radius 0.053nm. Calculate the tangential speed of this electron

asked by Rinae on December 30, 2015