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| year of daltons atomic theory? |
1803 |
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porkchoppony Thu, 14 Oct 2010 19:28:41 GMT |
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| Group |
vertical row |
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porkchoppony Thu, 14 Oct 2010 19:28:01 GMT |
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| period is the ___________ row on the periodic table |
horizontal |
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porkchoppony Thu, 14 Oct 2010 19:28:01 GMT |
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periodic table
arrangement of ______________ separated into ________________________ based on______________ ________- |
arrangement of elements separated into groups
based on reoccuring properties |
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porkchoppony Thu, 14 Oct 2010 19:28:01 GMT |
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| atomic mass of an element is equal to the wighted average mass of the _______________________ in a sample |
atoms |
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porkchoppony Thu, 14 Oct 2010 19:27:00 GMT |
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| atomic mass unit |
one twelfth of the mass of a carbon_12 atom |
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porkchoppony Thu, 14 Oct 2010 19:27:00 GMT |
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| atomic number |
number of protons in the nucleus of an atom of an element |
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porkchoppony Thu, 14 Oct 2010 19:27:00 GMT |
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| nucleus is composed of _________ _______ and _________-- |
protons
neutrons |
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porkchoppony Thu, 14 Oct 2010 19:27:00 GMT |
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| isotopes |
atoms with the same number of protons
BUT NOT NEUTRONS |
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porkchoppony Thu, 14 Oct 2010 19:25:42 GMT |
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| mass number |
total number of protons and neutrons in an atom |
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porkchoppony Thu, 14 Oct 2010 19:25:42 GMT |
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| neutrons |
NO CHARGE
EQUAL MASS TO PROTON |
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porkchoppony Thu, 14 Oct 2010 19:25:42 GMT |
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| protons |
positively charged |
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porkchoppony Thu, 14 Oct 2010 19:25:42 GMT |
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| cathode ray |
glowing beam |
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porkchoppony Thu, 14 Oct 2010 19:23:59 GMT |
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| electrons |
negatively charged subatomic particles |
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porkchoppony Thu, 14 Oct 2010 19:23:59 GMT |
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| Daltons atomic theory |
1. all elements are composed of atoms which are indivisible and industructable
2. all atoms of the same element are exactly alike: they all have the same mass
3. atoms of different elements are different: they have different masses
4. compounds are formed by the joining of atoms of two or more elements in any compound that atoms of different elements are combined in diff. porportions. |
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porkchoppony Thu, 14 Oct 2010 19:23:59 GMT |
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| atom |
smallest particle of an element |
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porkchoppony Thu, 14 Oct 2010 19:23:59 GMT |
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| scrodinger |
motions of electrons
"electron cloud model" |
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porkchoppony Wed, 13 Oct 2010 23:33:37 GMT |
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| moseley |
each element has diff # of protons |
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porkchoppony Wed, 13 Oct 2010 23:33:15 GMT |
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| proust |
law of definite porportions
ALL COMPOUNDS HAVE DEFINITE PORPORTIONS |
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porkchoppony Wed, 13 Oct 2010 23:33:15 GMT |
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| bohr |
electrons move in circular orbit
"Charge cloud model" |
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porkchoppony Wed, 13 Oct 2010 23:33:15 GMT |
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| rutherford |
gold foil expirment
"atoms are empty space, most of mass in nucleus" |
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porkchoppony Wed, 13 Oct 2010 23:33:15 GMT |
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| crookes |
cathode ray |
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porkchoppony Wed, 13 Oct 2010 23:31:56 GMT |
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| jj thomson |
discovered electron and charge:mass ratio
"Plum pudding" |
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porkchoppony Wed, 13 Oct 2010 23:31:56 GMT |
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| dalton |
made the atomic theory |
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porkchoppony Wed, 13 Oct 2010 23:31:56 GMT |
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| democritus |
prosed atom
"indisible and instructable" |
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porkchoppony Wed, 13 Oct 2010 23:31:56 GMT |
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