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12 Cards in this Set
- Front
- Back
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chemical bonding |
Two or more atoms are joined together to fill their outer shell (valence shell) the easiest way possible |
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chemical equation |
represents a chemical reactionExample of cellular respiration:C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy |
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reactant |
the starting materials in a chemical reactionExample of cellular respiration: (what is on the left side)C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy |
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product |
the ending materials in a chemical reactionExample of cellular respiration: (what is on right side)C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy |
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yields |
It is the symbol (-->) that separates the reactants from the products in a chemical equation. It shows the direction of the chemical reaction. It means the same as an = sign.Example of cellular respiration: C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy |
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subscript |
A number written slightly below and to the right of a chemical symbol that shows how many atoms of an element are in a compound. |
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coefficient |
The large number in front of a molecule that tells how many of those molecules are present. Ex: 2CO (2 molecules of CO) |
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law of conservation of mass |
In a chemical reaction (chemical change): mass you start with = mass you end with (Ex: You start with a mass of 10 grams, you end with 10 grams.) |
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chemical energy |
Stored in the chemical bonds of a compound |
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hydrocarbon |
A compound/molecule that only contains carbon and hydrogen (CH4) |
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combustion reaction |
Hydrocarbon + O₂ --> CO₂ + H₂O + energy (Ex: burning methane gas) |
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energy transformation |
Energy cannot be created or destroyed, but only changes form. The amount of energy you start with = the amount of energy you end with. It is also called the law of conservation of energy. |
