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12 Cards in this Set
- Front
- Back
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COMPOUND |
a substance that is composed of two or more different elements; a mixture. Ex. H2O, CO2 |
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ELEMENT |
A substance that cannot be broken down into simpler substances by chemical means
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MOLECULE |
The smallest piece of a substance. Ex. H2O, O2, CO2 |
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SYMBOLS |
A chemical symbol is a code for a chemical element. It is usually derived from the name of the element, often in Latin. |
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CHEMICAL REACTIONS |
In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed. |
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PHYSICAL CHANGE |
A physical change in a substance doesn't change what the substance is. |
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REACTANT |
A substance that takes part in and undergoes change during a reaction. |
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SOLUTION |
A mixture composed of 2 or more substances. |
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PRECIPITATE |
A precipitate is a solid that emerges from a liquid solution. |
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CHEMICAL FORMULA |
A recipe using coefficients and subscripts to explain what a substance is made of. |
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COEFFICIENT
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A number or symbol multiplied with a variable or an unknown quantity in an algebraic term. |
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SUBSCRIPT |
A type of lettering form written lower than the things around it. In chemical formulas the number of atoms in a molecule is written as a subscript, so we write H2O for water which has two atoms of hydrogen for each one of oxygen. |
