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12 Cards in this Set
- Front
- Back
Compound |
permanent combination of elements. exist as molecules |
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Element |
basic building blocks of other things/substances. Held together by bonds. Exist as Atoms |
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Bonds |
Connections of elements in a compound. Two types of Bonds: Ionic & Covalent |
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Ionic Bond |
has an electrostatic attraction. The total positive(+) charge must be equal to the total negative (-) charge. Ionic bonds form between something with a + charge and something with a - charge. Most often, the charge is a metal-except when the compound contains NH4. Characteristics: High water solubility. High Melting Point. Solution Conducts Electricity. High Boiling Point. |
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ions |
Charged substances |
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Electrostatic Attraction |
Attraction between a + charge and a - charge |
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Covalent Bonds |
million times more common than ionic bonds elements share electron pairs, so that each element involved contains the same # of outer shell electrons just as its nearest noble gas form between nonmetals |
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Covalent bond Element: Hydrogen |
1A Hydrogen (H)- (can pair with another hydrogen to be => H-H=H2 can form 1 bond |
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Covalent Bond Element: Fluorine |
7A element=7 electrons
can form one bond |
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Covalent Bond Element:
Oxygen |
Oxygen=O
6A element=6 electrons can form two bonds |
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Nitrogen |
Nitrogen=N 5A element=5 electrons can form three bonds |
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Carbon |
Carbon=C 4A element=4 electrons can form 4 bonds |