nuclear chemistry 3.3

Question 1

how are atoms radioactive

Answer 1

if the atom has to many/few neutrons and are unstable

Question 2

how can atoms become stable

Answer 2

by emitting radioation

Question 3

types of radiation

Answer 3

alpha, beta and gamma

Question 4

what are alpha particle stopped by

Answer 4

paper

Question 5

what are beta particles stopped by

Answer 5

aluminium

Question 6

what are gamma waves stopped by

Answer 6

thick concrete or lead

Question 7

how can you tell the type of radiation

Answer 7

by using electrically charged plates

Question 8

what charge of plates are alpha particles attracted to

Answer 8

negative

Question 9

what charge of plates are beta particles attracted to

Answer 9

positive

Question 10

what charge of plates are gamma waves attracted to

Answer 10

none, they have no charge

Question 11

what is radioactive decay

Answer 11

when atoms lose energy by emitting radiation

Question 12

what is a half life

Answer 12

the time for half the atoms in a radioactive substance to decay

Question 13

what are radioisotopes

Answer 13

isotopes that emit radiation