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10 Cards in this Set
- Front
- Back
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A.M.U
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Atomic Mass Unit
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an atom is made up of 1.) protons 2.)Electrons and 3.) Neutrons
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1 Proton or Nuetron is equal to 2000 electrons
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How is the P.T.E organized
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1.) By atomic number and 2.) Elements with the same proporties. (I.E. column 1 is the most reactive and coulmn 18 is the least reactive.)
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true or false
groups take the name form the element at the top of the family |
true
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true or false
Dmitri Mendeleev made the first periodic table of elements |
true
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true or false
1 proton is equal to 1 electron |
false
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if you change the number of electrons the atom becomes an ion
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if you change the number of uetrons the atom becomes an iceatrop
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99.99999% of an atoms weight is the nuculus
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in a stable or (nuetral) atom the the number of protons equal the number of electrons
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Proton = positive charge
Electron = negative charge Nuetron = a nuetral charge |
Dmitri Mendeleeve is the father of the P.T.E
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what are row called in the PTE?
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periods
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