Physics

Question 1

Plank’s relation (frequency)

Answer 1

The energy of a quantum which is the energy difference between energy levels
E=hf
h=planks constant (6.6Xe-34J*s)

Question 2

Angular momentum of an electron (Bohr’s model)

Answer 2

L= nh/2π
n=principle quantum number
h= planks constant
The angular momentum of an electron changes only in discrete amounts with respect to the principle quantum number

Question 3

Energy of an electron

Answer 3

E= -Rh/n^2
Rh= 2.18Xe-18 J/electron  

Energy of an electron changes in discrete amounts with respect to quantum number Energy of an electron increases (becomes less -) the farther out of the nucleus (increases n)

Question 4

Plank’s relation (wavelength)

Answer 4

E=hc/λ
c= speed of light 3xe8m/s
λ= wavelength of radiation

Question 5

Energy of electron transition (Bohr model)

Answer 5

E= -Rh[1/ni^2 - 1/nf^2]
The energy of the emitted photon corresponds to the difference in energy between the higher energy initial state and lower energy final state

Question 6

Atomic absorption spectrum

Answer 6

for an electron to jump from a lower energy level to a higher one, it must absorb an amount of energy in the form of light (photons) precisely equal to the energy difference between the two levels

Question 7

Quantum numbers

Answer 7

Describe any atom
n = average energy of a shell
l = subshells within a given principle energy level
ml= particular orbital within a subshell where an electron is likely to be found at a given moment in time
ms = spin orientation (+-1/2) of an electron in an orbital