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| Question | Answer |
| Atoms | Tiny building blocks that make up everything. |
| Molecule | Clusters of atom. The molecules that make up pure substances such as elements and compounds are all identical. Most non- metallic elements are made up of molecules. |
| Lattices | Crystal lattices are made up of many atoms stuck together in large-grid like structure. Most metallic elements are made up of crystal lattices. |
| Compounds | Pure substances that are made up of more than one type of of atom are known as compounds. |
| Mixtures | Substances that are made up of a combination of different elements and compounds are called mixtures. |
| Atomic Number | The number of protons in the nucleus. |
| Mass number | The number of protons and neutrons . |
| Alloy | An alloy is a metal combined with other elements. Ex, steel. |
| Properties of a metal: | 1.Have a metallic shine 2. Conduct heat and electricity 3. Can be bent or hammered |
| Properties of Non-Metals: | 1. Tend to be not shiny or dull 2. Cannot conduct heat or electricity. 3. Break or crumble. |
| Ductile | able to strech to form a wire |
| Malleable | able to hammered or bent into new shapes |
| Brittle | easily crumbles or shtters |
| Miscible | liquids that do not mix |
| immiscible | Liquids that do not mix |
| Electron Shells | 1st Shell: fits only 2 electrons 2nd Shell: fits only 8 electrons 3rd Shell: can fit 18, but happy with 8 electrons 4th Shell: can fit 32, but happy with 8 electrons |
| electronic configuration | gives the arrangement of the electrons in the energy levels around the nucleus |
| Valence electrons | Valence electrons are in the outermost shells. They decide the chemical properties of an element. |
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