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Atoms & Bonding
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atom
smallest particle of element
retains properties of the element
nucleus
small dense center of an atom
contains protons & neutrons
protons
positively charged
neutrons
no charge
where is most of the mass of atoms located
nucleus
electron orbital (electron cloud/ electron shell)
location of very small negatively charged particles
atomic number
number of protons
protons=electrons
determines type of element
mass number
sum of protons & neutrons
isotope
atoms same number of protons
different number electrons
nuclear symbol
mass number/atomic number atom aymbol
hyphen symbol
atom symbol-mass number
atomic mass
average mass of all naturally occuring isotopes
unit of average atomic mass
AMU
atomic mass unit
average atomic mass=
(mass)(%)+(mass)(%)/100
Author
ht2lvu
ID
2608
Card Set
Atoms & Bonding
Description
qtr 2 chemistry finals
Updated
2009-12-09T07:39:56Z
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