radiation Flashcards
1
Q
what is the charge of an atom, neutron, proton and electron?
A
atom = neutral
neutron = neutral
proton = positive
electron = negative
2
Q
what is the mass of a neutron, proton and electron?
A
neutron = 1
proton = 1
electron = negligible
3
Q
how do electrons move up and down energy levels?
A
absorbing and releasing energy
4
Q
what is an isotope?
A
element with different numbers of neutrons. same protons, different mass.
5
Q
why does a force hold the nucleus together?
A
to stop the nucleus from exploding
6
Q
what is radioactivity?
A
an unstable isotope will decay by emitting radiation to form a more stable isotope
