part 2 & 3

Question 1

define photon

Answer 1

any quantum of electromagnetic radiation

it has no charge

Question 2

define the rutherford atom

Answer 2

the first description of an atom having positively charged nucleus surrounded by a cloud of negatively charged electrons

Question 3

define positron

Answer 3

positively charged beta particle

Question 4

define nucleons

Answer 4

subatomic particles confined to the nucleus of an atom