Extra Credit

Question 0

Types of radiation

Answer 0

Alpha particle- 2 protons 2 neutrons
Beta particle- high energy electron
Positron- charge of 1+
Gamma- ray, high energy leaving

Question 1

Radioactive isotopes

Answer 1

Unstable nucleus

Emits radiation to become more stable

Question 2

Radiation protection from alpha particles

Answer 2

Paper and clothing

Question 3

Radiation protection from beta particles

Answer 3

Lab coat or gloves

Question 4

Radiation protection from gamma rays

Answer 4

Lead shield or thick concrete

Limit amount of time or increase distance from source

Question 5

Transmutation

Answer 5

Stable nucleus converted into radioactive nucleus by bombarding with small particles

Question 6

Rad (radiation absorbed dose)

Rem (radiation equivalent)

Answer 6

Measures radiation absorbed by body tissues

Measures biological damage caused by radiation

Question 7

Gray (gy)

Sievert (sv)

Answer 7

Joules of energy absorbed by 1 kilogram of body tissue (100 rad)

SI unit for rem (100 rem)

Question 8

Radiation sickness

Answer 8

Exposure to radiation greater than 25 rem

Question 9

LD50

Answer 9

Lethal foes for one half of the population

500 rem for. Humans

Question 10

Radioisotopes

Answer 10

Naturally occurring, have long half-lives

Used in nuclear medicine have short half-lives

Question 11

Technetium-99

Answer 11

Most widely used medicine in medicine

Question 12

Medical Application of radioisotopes

Answer 12

Have the same chemistry in the body as non radioactive atoms

Question 13

PET scans

Answer 13

Positron emission tomography
Uses fluorine-18
Checks brain function, metabolism, blood flow

Question 14

MRI

Answer 14

Least invasive imaging method available

Question 15

2 forms of radiation

Answer 15

External-occurs from outside

Internal- administered into specific area

Question 16

TAT

Answer 16

Targeted alpha therapy

Widespread cancers- beta particles