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13 Cards in this Set

  • Front
  • Back
radius of a nucleus is ___ angstroms
10^-4
Protons and neutrons, collectively are called
nucleons...
held together by the strong nuclear force
the strong nuclear force holds together the three___that make up each nucleon
quarks
surronding the nucleus at a distance of about ___ to ___ angstroms are electrons
electrons
mass of an electron is how many times smaller than the mass of a nucleon.
1800
the electron unit "e" is called the
electronic charge (1 e is equal to 1.6x10^-19 coulombs)
protons charge and mass
1+ ... 1.0073
neutrons charge and mass
neutral... 1.0087
electrons charge and mass
1-... 5.5x10^-4
_____ are the building blocks of all compounds and cannot be decomposed into simpler substances by chemical means
elements
In Elements the A stands for
mass number
In Elements the Z stands for
Atomic Number
two or more atoms of the same elemetn that contain different numbers of neutrons are said to be
isotopes