# A hydrogen atom is in its elevnth excited state, n = 12. Using the Bohr model of hydrogen, find the linear momentum.

You want to solve for the electron velocity and multiply that by the electrn mass. There are many ways to do this. One would be to get the radius of the orbit from
R = 12^2 *a, where a is the first Bohr orbit radius. Knowing R, you can equate the centripetal force to the Coulomb force and solve for velocity. You may also be able to use a relation that says the number of de Broglie waves in the circular orbit is an integer (in this case, 12). The de Broglie wavelength is inversely related to the linear momentum, with Planck's constant as the factor.

## To find the linear momentum of the hydrogen atom in its 11th excited state, n = 12, using the Bohr model, follow these steps:

Step 1: Determine the first Bohr orbit radius, 'a':
The first Bohr orbit radius, 'a', can be calculated using the formula:
a = 0.529 * Å (Bohr radius)

Step 2: Calculate the radius of the orbit, 'R', in the 11th excited state:
The radius of the 11th excited state orbit, 'R', can be determined using the formula:
R = n^2 * a

Substitute the value of 'n' as 12:
R = (12^2) * a

Step 3: Solve for the electron velocity, 'v':
To find the electron velocity, we can equate the centripetal force to the Coulomb force, which gives us the formula:
mv^2 / R = k * (e^2 / R^2)

Here, 'm' is the mass of the electron, 'v' is the electron velocity, 'k' is the Coulomb constant, and 'e' is the elementary charge.

Step 4: Rearrange the equation to solve for 'v':
Multiply both sides of the equation by 'R' and rearrange the terms to solve for 'v':
mv = k * (e^2 / R)
v = (k * e^2) / (m * R)

Step 5: Calculate the electron velocity, 'v':
Substitute the known values into the equation:
v = (k * e^2) / (m * R)
v = [(9 * 10^9 N*m^2/C^2) * (1.6 * 10^-19 C)^2] / [(9.1 * 10^-31 kg) * R]

Step 6: Calculate the linear momentum, 'p':
To find the linear momentum, 'p', multiply the electron mass, 'm', by the electron velocity, 'v':
p = m * v

Substitute the known values into the equation:
p = (9.1 * 10^-31 kg) * v

After performing the calculations, you will find the linear momentum of the hydrogen atom in its 11th excited state using the Bohr model.