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The atom GapFill
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C
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A simple model of an atom includes a central
containing
. This is orbited by
.
have a mass of approximately 1 amu and a charge of +1e.
have a mass of approximately 0 amu and a charge of -1e.
An atom which has lost or gained to become charged is called an ion.
Two or more nuclei that have the same number of but different numbers of are called isotopes.
The nucleus is held together with the nuclear force. This is attractive up to a range of and repulsive below ranges of . Because of this odd behaviour, some nuclei are unstable.
Some unstable nuclei undergo beta-minus decay. This is where turns into by releasing .
Other unstable nuclei undergo alpha decay. This is where the mass of the nucleus decreases because it has emitted a nucleus.
have a mass of approximately 1 amu and a charge of +1e.
have a mass of approximately 0 amu and a charge of -1e.
An atom which has lost or gained to become charged is called an ion.
Two or more nuclei that have the same number of but different numbers of are called isotopes.
The nucleus is held together with the nuclear force. This is attractive up to a range of and repulsive below ranges of . Because of this odd behaviour, some nuclei are unstable.
Some unstable nuclei undergo beta-minus decay. This is where turns into by releasing .
Other unstable nuclei undergo alpha decay. This is where the mass of the nucleus decreases because it has emitted a nucleus.