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| Anything that has mass or volume. |
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| Mass is the amount of matter in something. |
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| Volume is the amount of space that something takes up. this means that you and everything around you is matter. |
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| Everything in the world that isn't energy is a chemical or is made up of chemicals. Matter that is made up of a paticular chemical or chemicals is called a substance. Our bodies are made of chemical substances: oxygen, carbon, hydrogen, nitrogen, and others. |
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That of which a thing consists; physical matter or material form and substance. the actual matter of a thing, as opposed to the appearance or shadow;reality.
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| A pure substance is made up of only one kind of particle. Each part of a pure substance has the same properties, because each pure substence is made4 up its own type of particle. Each different pure substance has a different type of particle. Some pure substances are gold, hydrogen, and sodium chloride. |
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| A mixture is made up of two or more diffrernt types of particles mixed together onto one substance. Many mixtures are easy to identify- you can see the particles of the different substances in the mixture (for example, a pizza, a salad, or salt and pepper). But some mixtures look like there is only one type of particle because the particles of the different parts are so small they blend together (for example, soda pop, milk, milk, and apple juice). |
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| can be broken down into smaller parts using chemical reactions, an example of a compound is calcium carbonate, which is made up of calcium, carbon, and oxygen. |
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| An element cannot be broken down into smaller parts, this is because compounds are made up of two or more element. |
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| Share these physical properties: lustre- how well the surface of a substance reflects light. Malleability- can be bent or hammered without breaking. Ductility- can be stretched into a wire without snapping. Good conductors- heat or an electical current moves through them easily. Solid at room temperature (except for mercury, which is a liquid). many metals are a silvery grey colour. Some are spft while others are hard. |
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| Do not share these properties. They are gases or brittle solids at room temperature ( except bromine, which is a liquid). They are dull (not lustrous), malleable, or ductile, and they are poor conductors. They come in many different colours. Some are flexible while others are brittle. |
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| How can you handle chemicals safely in the classroom. |
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-wear goggles to protect eyes.
-use caution around open flame.
-some chemicals can cause chemical burns if touched, avoid contact with them.
-some chemicals are poisonous, avoid touching or breathing them.never taste chemicals. |
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| what are physical properties |
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| A physical property is a feature of matter you can determine without changing the type of matter that is. |
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| Types of physical properties |
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-state (solid, liquid or gas)
-melting, freezing, and boiling point
- conductivity-how well a substance lets heat or electrical current move through it
-density- how compact a substance is (calculated by dividing mass by volume)
-lustre- how well the surface of a substance reflects light
-solubility- how much of a substance dissolves in another substance
-texture-how the surface of a substance feels (rough, soft, or smooth |
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| what are chemical properties |
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| A chemical property describes how a substance changes when it is exposed to another substance to produce something new |
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| how is the periodic table organized |
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| the periodic table is a chart used to organized all the elements known today. |
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| what are chemical symbols? |
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| each of the elements has a chemical symbol for its name. some chemical either have one or two letters |
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| HHPS means Hazardous Household Products Symbol. symbols used for telling if its explosive, corrosive, flammmable or poison |
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| a molecule is made up of two or more atoms that are joined togetherby a chemical bond |
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| what are chemical formulas |
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| chemical formulas represent elements that exist as molecules and all compounds |
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