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which element has a whole number for atomic mass
carbon
which particles don't affect the stability of the atom
electrons
what is a rule for determining the mass number of an atom or ion
mass number=protons + neutrons
positive ions have ____ protons than electrons negative ions have _____ protons than electrons
more; less
which particles affect the charge of an atom or ion
protons and electrons
what particles determine mass number
protons and neutrons
which particles affect the stability of the atom
protons and neutrons
why is mass number always a whole number
rounded to an atomic mass unit
requirements for two atoms to be isotopes of each other
same number of protons as corresponding element; different masses; different number of neutrons
