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33 Cards in this Set
- Front
- Back
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Law of constant composition |
States that a given compound always has the same composition |
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Dalton's Atomic theory |
*1.different elements have different Atoms 2.all Atoms of one element are alike *3.elements form compounds with constant composition 4.Atoms are indivisible |
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JJ Thompson |
Discovered electrons(negative, subatomic and found in all Atoms) |
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Rutherford |
Discovered through his gold foil experiment, there are other particles in an atom. Discovered a dense center of the atom called the nucleus Concluded each atom has exactly the same # of protons and electrons |
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Nucleus |
Inside is protons(positive) |
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Charges |
Proton - Charge is +1 Electron - charge is -1 Neutron - no charge |
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Rutherford and colleague, chadwick found... |
Found another particle with no charge (neutron) |
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Atoms with the same number of protons and electrons but different number of neutrons on periodic table are called |
Isotopes |
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What represents protons and electrons |
ATomic number |
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Protons plus neutrons=? |
Mass number (could be diff from per table...) |
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Dimitri Mendeleer |
Russian scientist that First Arranged the periodic table Arranged them according to their similar properties and name them families |
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Groups |
Vertical on periodic table |
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Periods |
Horizontal on periodic table |
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Group 1 |
Alkali metal |
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Group 2 |
Alkaline earth metals |
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Group 17 |
Halogens |
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Group 18 |
Noble gases |
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Transition metals |
Elements that cover a great deal of the periodic table but are mostly found in the middle |
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Lanthanides and actinides |
Found in the bottom with periodic table are considered groups run horizontal Inner transition metals |
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Most of the elements on the periodic table are |
Metals |
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Top right section of the table that are |
Nonmetals |
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List for properties that at least two |
1. Most solid 2.good conductors 3.luster (shine) 4.malliable nonmetal 1.gases 2.poor conductors |
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Elements along the "stair steps" |
Metalloid ot semi metal Contain properties of metals and nonmetals Can conduct better than nonmetal but not as well as metals |
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Elements that contain two atoms in their normal Settings |
Diatomic molecules |
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How many diatomics are there |
Seven |
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What are they and how can you determine (diatomic) |
HOBr FINCl |
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Diatomic molecules area different type but |
Allotropes (Different forms of an element) |
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What are three allotropes of carbon |
1.Coal or charcoal 2.diamonds 3.graphite |
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When an atom starts to bond it can |
Lose or gain electrons and take on a charge (ions) |
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Valence electrons |
Outer energy level (electrons) |
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Ions with a positive charge |
Cat ions |
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Ions with negative charges |
Anions |
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Which element does not follow the Lewis dot diagram rule |
Helium |
