Transcript IONS and Isotopes PPT

Ion
a particle that is electrically
charged (positive or negative); an
atom or molecule or group that
has lost or gained one or more
electrons
Ions DO NOT ADD OR LOSE
PROTONS
What does the charge of an
Ion mean?
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It is the number of electrons that the
atom has added or lost.
For example, if a Hydrogen atom gains
an electron it would become negatively
charged (H-1)
How to find the number of
electrons in an ion.
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Find how many protons or electrons in
would have as a nuetral atom.
Then what ever the charge is (i.e.
positive) do the opposite of the charge
(subtract) to the electrons only
Cl+2 = 17 electrons -2 electrons = 15e
Isotope

one of two or more atoms with the
same atomic number but with different
numbers of neutrons
How do I recognize an
isotope?
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Firstly, the atomic mass weighs the
protons and neutrons in the nucleus.
So if you add or lose neutrons then the
mass will change.