Atoms And Radiation

Question 1

What is an alpha particle

Answer 1

Two neutrons , two protons

Same as a helium nucleus

Question 2

What are alpha and beta radiations deflected by

Answer 2

Electric and magnetic fields but gamma radiation is not

Question 3

What is the half life of a radioactive isotope

Answer 3

Average time it takes for the number of nuclei of the isotope in a sample to halve

Question 4

What do some substances do

Answer 4

Give out radiation from the nuclei of their atoms all the time, whatever is done to them
These substances are radioactive