Atoms and Chemical Bonds

Atoms and Chemical Bonds - Atoms and Chemical Bonds atom -...

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Atoms and Chemical Bonds atom - makes up all matter and all substances in the universe can be seen indirectly w/ tech such as tunnel microscopy electrons - (-) charge; revolves around the nucleus neutrons - no charge; in the nucleus protons - (+) positive charge; in the nucleus; determines the atom's atomic number mass - amount of substance weight - force gravity exerts on a substance atomic mass - equal the combined mass of neutrons/protons; measured in daltons (6.02*10^23 daltons=1 gram) isotopes - atoms of an element w/ different numbers of neutrons elements - same atomic number, same chemical properties radioactive isotope - isotopes that decay due to unstable nuclei; decay is constant half-life - time is takes 1/2 of the atoms to decay; can be used to determine age of biological material released subatomic particles could cause mutations in genes electrons - determines the charge in each atom neutral atoms - not net charge, same number of electrons/protons
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This note was uploaded on 01/04/2012 for the course BSC BSC1005 taught by Professor Orlando,rebecca during the Fall '10 term at Broward College.

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Atoms and Chemical Bonds - Atoms and Chemical Bonds atom -...

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