Radioactivity

MCQ - application in medicine

Which parameters of the atomic nucleus change during alpha decay

mass, charge, energy

which parameters of the atomic nucleus change during beta decay

charge , energy

which parameters of the atomic nucleus change during electron capture

charge , energy

Which parameter of the atomic nucleus changes during isometric transition

energy

what is emitted during alpha decay

Helium (He) nucleus and gamma rays ( often)

What is emitted during beta- negative decay

electron, antineutrino, gamma rays ( often)

What is emitted during beta positive decay

positron, neutrino, gamma rays (often)

What is emitted during electron capture ?

neutrino, gamma rays ( often)

The activity A of a radioactive surface

is directly proportional to the number of the radioactive nuclei it contains

The activity A of a radioactive source

decays exponentially over time

Half life is

The time it takes the radioactive nuclei of a specific type in the source to decay to one-half of their initial amount

the measurement unit for radioactivity is

becquerel ( Bq)

In beta negative decay, a neutron in the nucleus is converted into a proton and …….

electron

In beta positive decay a proton in the nucleus is converted into a ……….. and a positron

neutron

Radioactivity A ( decay rate ) is the average number of decaying nuclei per unit of ………..

time

The activity A ( decay rate ) of a radioactive source decays exponentially over

time

Radioactive chemical compounds were introduced into the body for the diagnosis or treatment of a disease are called ………..

radiopharmaceuticals