The radiation given off by a radioactive source can be measured with ___(1)___. The weak radiation should be recorded in units of c___(2)___ because the lab sources are extremely low on the ___(3)___ scale. radiation is a random event so it is best to make each measurement ___(4)___

Group of answer choices.
Number 1
a. a geiger counter
b. another radioactive source
c. a spectrophotometer

Number 2
a. half-lives
b. counts per minute
c. electron volts

Number 3
a. curie
b. electron volt
c. inch

Number 4
a. from different locations
b. with a different instrument
c. multiple times