Ch. 24 (Sect. 1 And Select Words)

Question 0

X-Ray

Answer 0

A form of high-energy electromagnetic radiation

Question 1

Radioisotope

Answer 1

Isotope of an atom with an unstable nucleus

Question 2

Penetrating Power

Answer 2

The ability of radiation to pass through matter

Question 3

Strong nuclear force

Answer 3

Force that acts on subatomic particles that are extremely close together and overcomes the electrostatic repulsion among protons

Question 4

Radioactive Decay Series

Answer 4

A series of nuclear reactions that begin with an unstable nucleus and results in the formation of a stable nucleus

Question 5

Half-life

Answer 5

The time required for one-half of a radioisotope’s nucleus to decay into its products

Question 6

Radiochemical Dating

Answer 6

The process of determining the age of an object by measuring the amount of a certain radioisotope remaining in that object

Question 7

Nuclear Fission

Answer 7

The splitting of a nucleus into fragments

Question 8

Critical Mass

Answer 8

A sample that is massive enough to sustain a chain reaction

Question 9

Nuclear Fusion

Answer 9

The combining of atomic nuclei

Question 10

Thermonuclear Reaction

Answer 10

Another name for fusion reactions because of the energy between the nuclei in the reaction

Question 11

Ionizing Radiation

Answer 11

Radiation that is energetic enough to ionize matter with which it collides

Question 12

Radiotracer

Answer 12

A radioisotope that emits non-ionizing radiation and is used to signal the presence of an element or specific substance