Atomic structure
what is the charge of a neutron?
0
The atomic number of an atom is the number of
Protons
what is the mass of an electron?
0
The mass number of an atom is the mass
Protons and neutrons
an isotope is an element that has different numbers of which Particles
Neutrons
what particle did James Chadwick discover?
Neutron
what is an ion?
An atom that has either lost or gained an electron
what is an alpha particle?
Two protons and two neutrons
what is the charge of a beta particle?
-1
what type of radiation is the least penetrating?
alpha
what is the name for time taken for the number of nuclei or radioactive isotopes in a sample to be halved?
Half life
which word describes the process of exposing an object to nuclear radiation?
irradiation
what happens to the atomic number and mass number of the nucleus when an alpha particle is admitted?
Decreases
which type of radiation does not cause the mass or charge of a nucleus to change?
gamma