half life

Question 1

what types of process is radio active decay

Answer 1

a random process
it is imposible to tell when a substance will decay

Question 2

what is half life ?

Answer 2

Half-life of the radioactive isotope is defined as the time taken for the number of radioactive nuclei to reduce to one half of its initial value.

Question 3

different isotopes have…..

Answer 3

different half lives

Question 4

what is carbon 14 used for

Answer 4

foe carbon dating
it is used to estimate the date of a prdct

Question 5

where can radioactive materials be used

Answer 5

in medicine

Question 6

When selecting a suitable isotope for a specific application, it is important to consider:

Answer 6

When selecting a suitable isotope for a specific application, it is important to consider:

the half-life of the isotope
the penetrating power and biological effects of the radiation

Question 7

how long of a a half life should the radioactive iosotpe have

Answer 7

a short one

Question 8

what can radioactive isotpes be used to treat how

Answer 8

they can be used to treat cancer diseases

A radioactive material can be placed inside the tumour to kill the cancer cells. The radiation emitted needs to be:

strongly ionising so that it kills the cells
moderately penetrating so it can pass through the tumour to kill the cancer cells without damaging healthy ones.

Question 9

lpha particles

Answer 9

are easily absobed by the cancer cells