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11 Cards in this Set
- Front
- Back
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What is the difference in composition between a compound and a mixture? |
Compound: fixed composition Mixture: no fixed composition |
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What is the difference in property between a compound and a mixture? |
Compound: own set of properties different from its constituent elements. Mixture: similar properties of its constituent elements |
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What is the difference in melting point and boiling point between a compound and a mixture? |
Compound: fixed melting point and boiling point Mixture: boils over a range of temperatures |
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What is the difference in separation between a compound and a mixture? |
Compound: cannot be broken down into simpler substances by physical means Mixture: easily separated into its substances by physical means |
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What is the difference in preparation between a compound and a mixture? |
Compound: A chemical reaction takes place. Heat is often produced. Mixture: No chemical reaction. |
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What is an element? |
An element is a substance that cannot be broken down into simpler substances by ordinary chemical methods. |
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What is matter made up of? |
It is made up of tiny particles called atoms. |
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What is an atom? |
An atom is the smallest particle of any element. |
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What is the difference between physical changes and chemical changes? |
Physical change: No new substance is formed. These changes are easily reversed. Chemical change: A new substance is formed. The new substance has new properties. Heat is usually produced. |
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What is a compound? |
A compound is a substance containing two or more elements joined together by a chemical reaction. A compound has very different properties from its constituent elements. |
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What is a mixture? |
A mixture is whereby the atoms of the elements are not joined together. |
