Term
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Definition
| created the first theory on atoms in 1800 |
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Term
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Definition
| when a chemical reaction takes place matter is not created or destroyed |
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Term
| Law of constant composition |
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Definition
| water is water is water. Its always h2o. Always the same percent of mass for each element is found in all types |
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Term
| Law of constant composition equation |
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Definition
| mass of element divided by the total mass of the compound times 100 equals the present |
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Term
| Chemical reaction involves |
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Definition
| a union or separation of individual atoms |
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Term
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Definition
Smallest
Negative charge
all identical |
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Term
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Definition
Positive charge
mass of 1.009 amu |
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Term
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Definition
mass of 1.009 amu
no charge |
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Term
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Definition
consists of 2 protons and 2 neutrons
positive 2 charge
are given off by naturally occurring radioactive elements |
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Term
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Definition
holds an atoms proton and neutrons
helps create quantum physics |
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Term
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Definition
Protons
Helps identify the atom
Top number in the box |
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Term
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Definition
protons and neutrons
Cannot identify an atom |
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Term
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Definition
different version of the same element.
same atomic number
number of neutrons in their nucleus
They have different masses
x/y
x is protons plus neutrons
y is atomic number |
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Term
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Definition
actual mass of the atom
given in amu |
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Term
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Definition
atomic mass unit
one twelfth of a carbon 12 |
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Term
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Definition
| the repeating behavior in the chemical property of the element |
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Term
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Definition
| properties of the elements recur in regular cycles when the elements are arranged in order of increasing atomic mass |
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Term
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Definition
Vertical column is a group
horizontal is called a period |
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Term
| 1a to 8a on the periodic table |
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Definition
| representative elements and main group elements |
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Term
| 1B and 8B on the periodic table |
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Definition
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Term
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Definition
| lanthanides and rare earth |
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Definition
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