2: atomic theory

Question 1

what did physicists see in 19th cen.?

Answer 1

H2 in tube excited w/ electrical discharge
disassociates into excited H atoms tht emitts light @ certain wavelength

Balmer series: n=2, visible lights
Lyman series: n=1, ultraviolets
Paschen series: infrared
all govenerd by Rydberg formula, predict wavelength

Question 2

why doesnt the bohr model work? (4 reasons)

Answer 2

it works for h bt doesnt explain:

• why e- in ground state (n=1) doesnt fall into the nucleus
• why only certain orbits are allowed (why not 1.5?)
• doesnt explain the splitting of H emission spectrum into 2 lines
• doesnt work for aatoms w/ more than 1 e-

Question 3

explain: v = c / λ

Answer 3

λ is wavelength = distance btw identical poinst on successive waves
c is speed of light
v = amount of oscilation cycles that occur btw fixed points per unit times
amplitude = height of wave

Question 4

transmission of energy in the form of waves and particle

Answer 4

light

Question 5

light can be absorbed or emitted as photons = tiny pockets of energy

when a photon is absorbed by a system, its energy increases by E

T or F

Answer 5

T

Question 6

light cannot be quantized- T OR F

Answer 6

F