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25 Cards in this Set
- Front
- Back
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matter
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everything
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element
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a pure substance
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compound
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a substance that has one or more types of atomms (H20)
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atom
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a basic unit of matter
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proton
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a positive charge
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neuron
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a negative charge
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electron
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same as the number of protons in an element
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Nucleus
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where the protons and neutrons are
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Atomic Number
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The number of protons/electrons in an element
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4 elements found in living things
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Hydrogen Oxygen Nitrogen Carbon
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Hydrogen Bond
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a weak bond between polar (+,-) substances (ex. H20)
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Ionic bond
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a bond between ions, when an atom gives a number of electrons to another atom so that they are both happy : )
This would give the atom and ionic (- or +)charge |
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Covalent Bond
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The strongest bond between atoms when two atoms come together to share electrons making them both happy : )
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Properties of water
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covalent bonds between the hydrogen and oxygen, hydrogen bonds between the water molecules
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Cohesion
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the tendancy for molecules of the same kind to stick together
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Adhesion
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molecules sticking to a different type of surface
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Acids
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Substances with a pH value that makes them acid
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Bases
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an aqueous substance that can accept protons
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pH
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a measure of acidity
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solution
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a mixture of 2 or more subatances
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Solvent
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dissolving substance (water on salt)
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Solute
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whats being dissolved (salt by water)
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chemical reaction
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a reaction between two different chemicals that creates a new substance
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reactant
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the substance chaanged during a chemical reaction
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product
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what is produced by a chemical reaction
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