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| Pregunta | Respuesta |
| Element | A simple substance that cannot be split into anything simpler by chemical reactions. |
| Atoms | The smallest particles of an element. Atoms of one element are all the same, and are different from atoms of all the other elements. |
| each element has a....... ...... | chemical symbol |
| Chemical Symbol | Is usually one or two letters. It is written with the first letter as a capital, and the second lower case. |
| chemical symbol of oxygen | O |
| Chemical symbol of carbon | C |
| Chemical symbol for iron | Fe |
| Chemical symbol for alluminum | Al |
| when elements join together they make | compounds |
| compounds made form two elements always have a name that ends with... | ide |
| carbon,oxygen | carbon oxide |
| sodium,chlorine | sodium chloride |
| magnesium,oxygen | magnesium oxide |
| Chemical formula | tells you the name and number of atoms in a compound |
| the smallest particle of many compounds is called a ........ | molecule |
| molecules | are made up of groups of atoms.Some elements are also molecules. |
| A molecule of oxygen | O 2 |
| molecule of water | H O 2 |
| METALS properties | -good conductors of heat and electricity -shiny -solids with a high melting point -left side of the periodic table -three metals are magnetic -flexible |
| NON METALS properties | -poor conductors of heat and electricity -dull -solids or gases -right hand side of the periodic table -brittle |
| all materials are made up of | 90 elements |
| raw materials are | non-renewable |
| a process that uses recycled or renewable materials is | substainable |
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