Chapter 9: Atomic and Nuclear Phenomenon

Question 1

Photoelectric Effect

Answer 1

When light of a high frequency ( blue -> UV light) is incident on a metal in a vacuum , the metal atoms emit e-

Question 2

Current

Answer 2

A net charge flow per unit time that is produced when electrons are liberated from the metal by the photoelectric effect

Question 3

Threshold Frequency

Answer 3

Minimum frequency that causes ejection of e-

*Depends on the type of metal being exposed to the radiation

Question 4

If frequency is less than threshold frequency, will an electron(s) be emitted?

Answer 4

No electron will be ejected because the photons do not have sufficient energy to dislodge the energy from its atom.

Question 5

Work function

Answer 5

Minimum amount of energy required to eject an e-

Question 6

Photons

Answer 6

Discrete bundles of energy of light

Question 7

Mass Defect

Answer 7

Result of matter that has been converted to energy

Question 8

Strong Nuclear Force

Answer 8

Is the attractive force between protons and neutrons

Is stronger than the repulsive electromagnetic force between the protons.

Question 9

Binding Energy

Answer 9

Energy that allows the nucleons to bind together in the nucleus.

Question 10

Fusion

Answer 10

Occurs when small nuclei combine to form a larger