gamma		like charges _____ each other
proton		decay that releases only energy; no particles
nucleus		neutral particle
becquerel		space surrounding the nucleus
atom		used to control the rate of reaction in a nuclear power reactor
rutherford		positive charged particle
isotope		discovered radioactivity
electron		an electron form a nuclear decay is a ____ particle.
fission		discovered electrons
mass number		opposite charges ____ each other
controlrods		alpha radiation is easily stopped by this material
attract		protons and neutrons combined
fusion		discovered the nucleus
halflife		splitting a Uranium nucleus to release energy
paper		time required for 1/2 of a radioactive sample to decay
neutron		___ and ___ were the first two atomic bombs
fatmanlittleboy		smallest particle of matter that retains properties
decayseries		An atom with mass number 75 and 44 protons would have how many neutrons [spell out number]
beta		A particle of 2 protons and 2 neutrons
alpha		all the radiaoctive decays an element goes through to become stable
atomicnumber		joining 2 hydrogen nuclei to form a helium nucleus
electroncloud		negative particle
thirtyone		number of protons in an atom
repel		atoms of the same element with different mass numbers
thomson		small, dense and solid