ATOMS

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  • Created by: leah
  • Created on: 12-04-14 11:44
isotope
atoms with the same atomic number but different mass number/ same number of protons , different number of neutrons
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relative isotopic mass
mass of an atom of an isotope compared with 1/12 of the mass of an atom of carbon12
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ionisation energy
energy required to remove one mole of gasous electrons from one mole of gaseous atoms to form one mole of gasous ions with a sing positive charge
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first ionisation energy of sodium
Na(g)---->Na+ + e-
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factors affecting ionisation energy
Atomic Radius, Nuclear Charge, Electron Sheilding
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Orbital
Region of space electrons are most likely to be in
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periodicity
a repeating pattern across different periods
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describe the distrobution of mass and charge in an atom
positivley charged nucleus containing most of the mass, surrounded by atomic shells with orbiting electrons of negative charge and negative mass
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mass number/ nucleon number
number of neutrons added to the number of protons
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atomic number
proton number, shows the number of protons in the nucleus, it defines an element
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relative atomic mass
average weighted mass of an atom of an element compared with 1/12 of the mass of an atom of carbon12
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across the periodic table
ionisation energy inreases due to the nuclear charge being bigger so the electrons are attracted more strongly also the atomic radius is smaller so the electrons are closer to the nucleus therefore the attration is more effective
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down the periodic table
ionisation energy decreases due to atomic raidus being bigger so the electrons are less effectivley attracted despite the larger nucear charge more sheilding blocks the attractive force of the nucleus
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S Orbital
holds up to 2 electrons
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P Orbital
holds up to 6 electrons
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Other cards in this set

Card 2

Front

mass of an atom of an isotope compared with 1/12 of the mass of an atom of carbon12

Back

relative isotopic mass

Card 3

Front

energy required to remove one mole of gasous electrons from one mole of gaseous atoms to form one mole of gasous ions with a sing positive charge

Back

Preview of the back of card 3

Card 4

Front

Na(g)---->Na+ + e-

Back

Preview of the back of card 4

Card 5

Front

Atomic Radius, Nuclear Charge, Electron Sheilding

Back

Preview of the back of card 5
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