1. C HAPTER 2 Section 1 Classifying Matter

2. W HAT IS MATTER ? Matter- anything that has mass and takes up space Examples Desks You Chair Paper Stars

3. T HINGS THAT ARE NOT MADE OF MATTER Sound Light Energy Empty Space

4. C LASSIFYING M ATTER All matter can be classified as An element A compound A mixture

6. E LEMENTS Elements are substances that cannot be broken down into simpler substances by chemical means Examples Carbon (C) Oxygen (O) Nitrogen (N)

7. The smallest unit of an element is an atom. Each element is made up of one type of atom.

10. A LL ELEMENTS ARE REPRESENTED BY A CHEMICAL SYMBOL The chemical symbol is one or two letters. The first letter is always capital The second letter is always lowercase

11. W HAT ARE THE CHEMICAL SYMBOLS FOR THE FOLLOWING ELEMENTS ? Carbon Oxygen Nitrogen Nickel Lithium Helium

12. M OLECULES A chain of atoms linked together If two atoms are chemically bonded, it is a molecule

14. C OMPOUNDS Compounds are substances made up of atoms of different elements. Each molecule of a compound contains two or more elements that are chemically combined

15. C OMPOUNDS AND M OLECULES All compounds are molecules Not all molecules are compounds A molecule is only a compound if it is composed of more than one type of atom

16. C LASSIFY THE FOLLOWING AS A MOLECULE, COMPOUND, OR ELEMENT. C HOOSE ALL THAT APPLY C 4 - Carbon Hydrogen -H 2 Water -H 2 O N- Nitrogen NaCl – Table Salt C 12 H 6 O 12 - Sugar

17. M IXTURES A combination of substances that are not chemically combined Examples Salt Water Sugar Water Sand

18. L UCK C HARMS IS AN EXAMPLE OF A MIXTURE

19. P URE S UBSTANCES A pure substance is matter that has a fixed composition and definite properties All elements and compounds, when by themselves, are pure substances.

20. E XAMPLES OF P URE S UBSTANCES Nitrogen Oxygen Carbon Dioxide Water Diamonds Sugar