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the number of protons in the nucleus of an atom
atomic number
isotopes
atomic mass unit
atomic mass
electron
neutron
radioactivity
nucleus
the total of the masses of the particles in an atom
atomic number
isotopes
atomic mass unit
atomic mass
electron
neutron
radioactivity
nucleus
the emission of rays and particles from an unstable nucleus
atomic number
isotopes
atomic mass unit
atomic mass
electron
neutron
radioactivity
nucleus
a unit used to measure the mass of an atom; 1/12 the mass of a carbon-12 atom
atomic number
isotopes
atomic mass unit
atomic mass
electron
neutron
radioactivity
nucleus
a negatively charged particle with an extremely small mass
atomic number
isotopes
atomic mass unit
atomic mass
electron
neutron
radioactivity
nucleus
a neutral particle in the nucleus of an atom, with approximately the same mass as a proton
atomic number
isotopes
atomic mass unit
atomic mass
electron
neutron
radioactivity
nucleus
the center of an atom, which contains protons and neutrons
atomic number
isotopes
atomic mass unit
atomic mass
electron
neutron
radioactivity
nucleus
different forms of the same element that have different numbers of neutrons
atomic number
isotopes
atomic mass unit
atomic mass
electron
neutron
radioactivity
nucleus
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