Chapter 20

Question 1

Fission

Answer 1

Splitting heavy nucleus into 2+ lighter nuclei

Question 2

Fusion

Answer 2

Very light nuclei are combined into a heavier one

Question 3

Nuclear Binding Energy

Answer 3

Energy needed to break a nucleus into the p+ and n^0 that make it up

Question 4

Fission and Fusion both result in the conversion of ___ to ___

Answer 4

Mass; energy

Question 5

Nuclear reaction

Answer 5

Change of a nucleus

Question 6

Nucleon

Answer 6

Term for p+ and n^0 in a nucleus

Question 7

Parent nuclide

Answer 7

Unstable nuclide of a nuclear reaction

Question 8

Daughter nuclide

Answer 8

Produced by the radioactive decay of another nuclide

Question 9

Electron capture

Answer 9

Electron is taken from the s orbital to the nucleus to combine w/ a p+ to create a neutron

Question 10

Beta particle

Answer 10

High energy e-

Question 11

Alpha particle

Answer 11

High energy He nucleus

Question 12

Beta decay

Answer 12

Neutron breaks into a p+ and a beta particle (e-) is emitted

Question 13

Alpha decay

Answer 13

Loss of an alpha particle

Question 14

Binding energy per nucleon

Answer 14

Total binding energy for nucleus/ # of nucleons in nucleus

Question 15

Gamma ray

Answer 15

Short wavelength, high energy, electromagnetic radiation

Question 16

Gamma emission

Answer 16

Decay of an excited-state nuclide

Question 17

Half-life

Answer 17

Time required for half of the atoms in a radioactive sample to decay

Question 18

Mass defect

Answer 18

The “lost” mass when nucleons are brought together to form a nucleus

Question 19

Radioactive decay

Answer 19

Spontaneous decay of an unstable nuclide

Question 20

Radioactivity

Answer 20

Unstable nucleon changes into nucleon that is more stable

Question 21

Unstable nucleons are said to be ___

Answer 21

Radioactive