Bohr's Model Of Hydrogens

Question 1

What are the limitations of Bohr’s model?

Answer 1

1. It does not work for systems with more than one electron, so it only works on hydrogen.
2. It is based on a false assumption that electrons travel in orbits

Question 2

There is an equation for finding the atomic radius r(n), it is…

Answer 2

r(n)= (n^2)(5.2910^-11)

n is the number of shell the electron is in.

Question 3

The energy level of an electron in a shell of hydrogen can be found by…

Answer 3

E(n)=(-2.178*10^-18)/(n^2)

The answer is always negative and the ground state (n=1) has the most negative value

Question 4

The change in energy level is negative when…

Answer 4

Negative means loss, it happens when an electron went to a lower energy level

Question 5

We can find the frequency with the energy level of an electron , the two equations needed are…

Answer 5

1. The equation of change in energy of an electron
2. E=hv E is the energy of the photon absorbed, so E is also the change in energy

(1)=(2)

Question 6

When an electron falls to the first energy level, it is known as …(series). It is associated with…(spectrum)

Answer 6

Balmer series.

UV light

Question 7

When an electron falls to the second energy level, it is known as…(series). It is associated with …(spectrum)

Answer 7

Lyman series.

Visible light spectrum

Question 8

When an electron falls to the third electron level, it is known as …(series). It is associated with …(spectrum)

Answer 8

Paschen series.

Infrared spectrum