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ELEMENTS JOIN TOGETHER TO MAKE COMPOUNDS Hydrogen Atom /Hydrogen Element CARD SORT ACTIVITY Before Symbol After C E H2O C C E E C E E C C NaCl Pb Ne CaCl Au He NaF Co2 ELEMENTS Elements are substances that cannot be broken down into any other substance by chemical or physical means. The Periodic Table organizes the elements based on their physical and chemical properties. Atomic Number 1 H Atomic Mass 1.0079 Element Symbol PERIODIC TABLE REVIEW Activity: Use your periodic table to find the following elements. Write their symbol on your white board and hold it up when done. (Let’s see who knows the Periodic Table BEST!) Carbon Helium Lithium Oxygen Sodium Gold Nitrogen Hydrogen COMPOUNDS When elements are combined they make compounds. Made of two or more different elements joined by a chemical bond. Has Can a chemical formula only be separated by chemical means, not physically You will be shown a series of photos. Tell if each photo represents an item composed of an element or compound! Review: An element contains just one type of atom. A compound contains two or more different atoms joined together. ELEMENT OR COMPOUND? COPPER (CU) ELEMENT OR COMPOUND? Copper ELEMENT OR COMPOUND? Table Sugar-C12H22O11. ELEMENT OR COMPOUND? Table Sugar ELEMENT OR COMPOUND? Diamond- C ELEMENT OR COMPOUND? Diamond ELEMENT OR COMPOUND? Pure Water- ELEMENT OR COMPOUND? Pure Water ELEMENT OR COMPOUND? Silver- Ag ELEMENT OR COMPOUND? Silver LET’S SEE IF YOU GET IT??? http://home.clara.net/darvill/multichoice/emc.htm