Topic 1- Lecture 2

Question 1

The number of times a wave repeats itself per second

Answer 1

Frequency

ν

Question 2

Linear distance a wave covers before repeating itself

Answer 2

Wavelength

λ

Question 3

C=λν

Answer 3

Speed of light= wavelength X frequency

3.00 x 10^8 m/s

Question 4

Short wavelength=

Answer 4

Large frequency

Question 5

Long wavelength=

Answer 5

Small frequency

Question 6

The height of each step is equal to one quantum of energy for a certain frequency electromagnetic radiation.

Answer 6

Quantum Theory

Max Planck

Question 7

E=hν

Answer 7

Quantum Theory
E=energy per quantum
h= Planck’s constant (6.63x10^-34)
ν= frequency

Question 8

1. Highly intense low frequency light does not eject any electrons
2. When threshold frequency is reached, electrons are ejected immediately
3. Increasing the intensity of light that ejects electrons causes electrons to be ejected at a greater rate and velocity, but all electrons share the same velocity

Answer 8

Photoelectric effect

Question 9

A beam of light is a stream of particles called…

Answer 9

Photons

Einstein

Question 10

A photon is equal to a…

Answer 10

Quantum

Einstein

Question 11

If the frequency of a photon is below a certain threshold, no…

Answer 11

Electrons are ejected

Einstein

Question 12

If the frequency of the photon is at or above a certain threshold, it’s energy is transferred…

Answer 12

To the electron

Question 13

Energy increases as…

Answer 13

Frequency increases

Einstein and Planck

Question 14

Forces of attraction between the electrons and the nucleus result from…

Answer 14

Opposite charges

Question 15

The force of attraction decreases as the distance between the outermost electron and the proton increases.

Answer 15

Coulomb’s Law

Question 16

1. Electrons move around nucleus in circular orbits
2. Each orbit is a fixed distance from nucleus
3. Electrons within an orbit have set, quantized, energy levels

Answer 16

Bohr Model

Question 17

Electrons that are furthest from the nucleus are partly “blocked” by the inner core electrons

Answer 17

Shielding effect

-reduces electrostatic attractions

Question 18

The minimum amount of energy needed to remove the outermost, least tightly held, electron from an atom

Answer 18

First Ionization Energy

Question 19

Low ionization to high ionization across the periodic table

Answer 19

Increases left to right

Question 20

Ionization data suggests that electrons are arranged in shells

Answer 20

Shell Model

Question 21

N=1

Answer 21

2 electrons

Question 22

N=2

Answer 22

8 electrons

Question 23

Electrons contained in inner shell(s)

Answer 23

Inner core electrons

Question 24

Electrons contained in outer shell

Answer 24

Valence electrons

Question 25

1s

Answer 25

2 electrons

Question 26

2s

Answer 26

2 electrons

Question 27

2p

Answer 27

6 electrons

Question 28

3s

Answer 28

2 electrons

Question 29

3p

Answer 29

6 electrons

Question 30

3d

Answer 30

10 electrons

Question 31

Ionization energy decreases due to an increase in the…

Answer 31

Shielding effect