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19 Cards in this Set
- Front
- Back
What is matter?
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Anything that has mass and takes up space
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What is a substance?
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A single kind of matter that is pure - meaning it always has a specific makeup(composition) and a specific set of properties
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Every form of matter has what two properties?
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physical properties and chemical properties
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What is a physical property?
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A characteristic of a pure substance that can be observed without changing it into another substance
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What are examples of physical properties?
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Density
Melting point Texture and Color flexibility |
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What is a chemical property?
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A characteristic of a pure substance that describes its ability to change into different substances
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Waht are examples of chemical properties
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flammability
Ability to react9rust forming on a car |
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What is an element?
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An element is a pure Asubstance that cannot be broken down into any other substances by chemical or physical change
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Waht is an atom?
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Particles of elements-the basic particle from which all elements are made
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What is a chemical bond?
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When atoms combine, they from a chemical bond, which is a force of attraction between two atoms.
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What is a molecule?
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A larger particle formed from the combination of atoms
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What are examples of molecules?
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Water molecule- Two hydrogen atoms plus on e oxygen atom(H20)
Oxygen molecule - O2 Carbondioxide molecule - CO2 |
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What is a compound?
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A pure substance made up of 2 or moreelements chemically combined in a set ratio. A compound may be reperesented by a chemical formula
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What is a chemical formula?
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It shows the elements in the compound and the ratio of atoms (example H2O)
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True or False?
When compounds chemically combine, they form compound s having properties different from those of the combined substances. |
True
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What is a mixture?
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A mixture is made up of two or more substances --elements, compounds or both-that are togerther in the same place but are not chemically combined.
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What is a heterogeneous mixture?
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A mixture where you can see the individual parts - Example is a salad, , ,can see lettuece, tomatoes, etc
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What is a homogeneous mixture?
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Substances so evenly mixed you cannot see the individual parts Example - solutions such as sugar mixed into water
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Name four methods used to separate mixtures?
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Magnetic attraction
Fitration Distillation Evaporation |