Modern Atomic Theory - 3-3 MODERN ATOMIC THEORY ATOMS contain protons neutrons and electrons(which can also be subdivided into quarks gluons mesons

Modern Atomic Theory - 3-3 MODERN ATOMIC THEORY ATOMS...

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3-3: MODERN ATOMIC THEORY
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ATOMS contain protons, neutrons, and electrons (which can also be subdivided into quarks, gluons, mesons, muons, etc. It takes approximately 2000 electrons to equal the mass of 1 proton!
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SUBATOMIC PARTICLES PARTICLE: LOCATION: CHARGE: ATOMIC MASS: proton inside the nucleus + charge 1 amu neutron inside the nucleus no charge 1 amu electron outside the nucleus - charge 0 amu (electron cloud)
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OTHER INFO atomic mass units (amu): the approximate mass of 1 proton OR 1 neutron (Remember electrons are 1/2000 of a proton, so their amu is considered to be zero!!!) Misc: the diameter of an atom is approximately .100 - .500 nm (1 nm = 10 -9 m) electron cloud: area where you are most likely to find an atom's electrons
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IONS atomic number: the number of protons in an atom (discovered by Mosely) - In a neutral atom, the number of protons IS EQUAL TO the number of electrons. ions: formed when an atom gains or loses one or more electrons - if an electron is lost, the ion has a positive charge
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