Atomic Number
The Number of Protons in the
Nucleus.
Cation
Atom with a positive charge (more protons than electrons)
Anion
Atom with a negative charge (more electrons than protons)
he number of Protons CAN or CAN NOT be changed?
Can NOT (except in stars)
electrons
are ...
Neutrons stabilize an atom and keep the protons and electrons from
pulling each other apart.
When the number of neutrons is changed, the atom destabilizes and
becomes radioactive.
Uses for Isotopes
Medicine (PET scans, FDA approved isotopes, C14 traces how carbon moves through
plants, Radiometic dating..)
half life
Time it takes for an atom to lose 50% of its energy
covalent bond
electrons are shared
ionic bond
electrons are taken
hydrogen bond
weak attraction between slightly charged atoms
and a hydrogen atom
covalent bond example
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