TERM 1
isotope
DEFINITION 1
an atom of the same element (same number of protons) that
has a different number of neutrons
TERM 2
radioactive isotope
DEFINITION 2
unstable isotope- spontaneously emits energy to form a
more stable nucleus
TERM 3
alpha particle
DEFINITION 3
a high energy particle that contains 2 protons and 2
neutrons, +2 charge, and a mass number of 4
TERM 4
beta particle
DEFINITION 4
a high energy electron, a -1 charge, and a negligible mass
TERM 5
positron
DEFINITION 5
an "antiparticle" of beta particle since they have the same
negligible mass and opposite charges, +1 charge
