quiz 6

Question 1

light behaves like…

Answer 1

a wave. it has both an electrical and magnetic field

Question 2

length of light’s wave

Answer 2

wavelength symbolized by λ (lamda)

Question 3

what determines the color of visible light?

Answer 3

the wavelength
violet-red goes from 400-700 nm
but also frequency, as wavelength and frequency are inversely proportional
AND also energy, as wavelength & frequency determines the amount of energy emitted

Question 4

high wavelength means

Answer 4

low v (frequency)
low E (energy)

Question 5

low wavelength means

Answer 5

high v (frequency)
high E (energy)

Question 6

relationship between wavelength and frequency

Answer 6

inversely proportional

v* λ = c, where c is the speed of light (a “constant” …in a vacuum)

Question 7

units of frequency

Answer 7

1/second

or Hz where Hz=1 (cycle)/sec

Question 8

the spectrum of white light is continuous or discrete?

Answer 8

continuous

Question 9

constructive interference

Answer 9

when waves reach their maxs and mins at the same place, their amplitudes are added to created a new, higher wave

Question 10

destructive interference

Answer 10

when two waves are out of phase (A reaches its max as B reaches its min and vice versa), the waves cancel each other out

Question 11

Bohr’s ladder

Answer 11

• theory that electrons are restricted to certain orbits of the nucleus (n=1, n=2, n=3, etc)
• an electron absorbs energy in the form of a photon (light) and gets boosted from a lower orbit to higher orbit, then releases that photon energy (light) as it drops from higher to lower orbit
• the amount of energy emitted determines the color
• correctly predicted emission spectra of hydrogen gas
• correctly asserted that electrons occupy certain discrete levels
• but could only predict atoms with one electron total
• and electrons dont travel in orbits
• was replaced by modern quantum mechanics

Question 12

energy level transitions for discrete spectrum

Answer 12

• go from discrete levels
• UV region from 2+ -> 1 (lymon)
• visible region 3+ -> 2 (balman)
• infrared region from 4+ -> 3 (paschen)

Question 13

energy level transitions for continuous spectrum

Answer 13

electrons dropping from everywhere, even between discrete energy levels

Question 14

amplitude of wave determines light’s

Answer 14

intensity/brightness. higher amplitude, higher intensity

Question 15

s orbital shape

Answer 15

a ball

Question 16

p orbital shape

Answer 16

dumbell

Question 17

d orbital shape

Answer 17

four leaf clover

Question 18

trend of atomic radius on periodic table

Answer 18

increases as you go down and to the left (lower left corner is largest)

Question 19

trend of ionization energy

Answer 19

increases as you go up and to the right (upper right corner is largest)