NM Half-life

Becquerel (Bq)

SI unit for measuring the activity of a radioactive substance

Curie (Ci)

An older unit of radioactivity

Gray

SI unit for absorbed radiation dose

Grat

Important for determinibg the potential harm caused by radiation exposure

Rad (Radiation Absorbed Dose)

Older unit of absorbed radiation dose

0.01

1 Rad is equivalent to ____Gy

Sievert (Sv)

SI unit of radiation dose equivalent

Sievert (Sv)

Accounts for the biological effects of different types of radiation on human tissue

1

Gamma radiation has a weighting factor of _____

20

Alpha radiation has a weighting factor of _____

Rem

Older unit of radiation dose equivalent

0.01

1 Rem is equivalent to ____Sv

Roentgen

Unit of exposure to ionizing radiation in the air by X-rays or gamma rays

Bq per square meter

Used to measure the amount of radioactive contamination on a surface

Counts per minute (CPM)

Used in laboratories or environmental monitoring to quantify the number of radioactive decays detected per minute by a radiation counter

37

1 mCi = ___MBq

Random

Radioactive decay is ______

Half life

______ provided a predictable average for a large number of atoms

8 days

Half-life of Iodine-131

6 hours

Half-life of Technetium-99m

4.468 billion yrs

Half-life of Uranium-238

5730 yrs

Half-life of Carbon-14

Decay rate

The ________ is an unalterable property of a radionuclide

3.8 days

Half-life of Radon

109 mins

Half-life of Fluorine-18