Electromagnetic Spectrum

Question 1

Electromagnetic Radiation:

Answer 1

a type of energy that travels through space at a constant speed

Question 2

Speed of light

Answer 2

3.00 x 10e8

Question 3

Wavelength

Answer 3

• The distance between the crests of a wave
• It is measured in m, cm, or nm
• should always convert it to m.

Question 4

Frequency

Answer 4

• the number of cycles that pass by a point in a given amount of time
• It is usually measured in Hz.

Question 5

the wavelength, frequency, speed of light

Answer 5

c=λv

Question 6

bohr’s model

Answer 6

• An inaccurate model that describes electrons moving in circular orbits around the nucleus
• Each orbit has fixed energy, AKA energy levels
• Electrons do not move in circular orbits around the nucleus, and this model doesn’t work for multi-electron atoms

Question 7

Quantum

Answer 7

the amount of energy required to move an electron from one level to another. it is the minimum amount of energy that can either be lost or gained by an atom

Question 8

energy, Planck’s constant, frequency

Answer 8

E= hv

Question 9

Planck’s Constant

Answer 9

6.626 x 10e-34

Question 10

E

Answer 10

• the energy of a quantum of radiation
• the unit is joules or J

Question 11

directly proportional

Answer 11

-energy and frequency are directly proportional to wavelength
- Ex: shorter wavelength means higher energy and higher frequency (and vice versa)

Question 12

when you have the energy and want to find the wavelength

Answer 12

hc/ λ
1.99 x 10e-25/ λ

Question 13

Hydrogen emission spectra

Answer 13

• Bohr’s model only works for hydrogen atoms, as they only have one electron

Question 14

ground state

Answer 14

the electron is in the lowest possible energy level

Question 15

excited state

Answer 15

the electron gained energy and is in a higher energy level