2. How can you determine whether something is an element or not? They are all listed on the periodic table. ELEMENT SONG

3. 1.Pure substance –Made of only 1 type of particle –Ex: copper wire only has copper atoms 2.Can’t be separated into simpler substances by chemical or physical means

4. 3.Each has a unique set of properties –Called characteristic properties –Can be physical or chemical 4.Classified by their properties 1.Metals 2.Nonmetals 3.Metalloids Elements Metals Nonmetals Metalloids

5. Develop the concept map by adding info. about metals, nonmetals, & metalloids METALS Shiny Good conductors Malleable Ductile Ex: gold, silver, copper NONMETALS Dull (no shine) Poor conductors At room temp, only a few are solids that are brittle Most are gases Ex: hydrogen, oxygen, helium METALLOIDS Characteristics of metals and nonmetals Semiconductors Ex: silicon, germanium

6. Use placement on the Periodic Table to classify elements

7. Do you know any compounds? How are they different from elements? Characteristics 1.Found in nature more often than pure elements 2.Have more than one element 3.Elements are chemically bonded to each other –Mg + O 2 makes MgO 4.Pure substances that occur in fixed ratios by mass –1g H to 8g of O in every water molecule 5.Can’t be separated by physical means 6.Have their own unique set of properties

8. CLASSIFICATION OF MATTER

9. Mixtures 2 or more substances that are not chemically bonded –So diff parts keep their own properties Ex: –pizza –granite –Kool-aid –Brass –Jello Parts do not occur in a definite ratio –Compare the 2 pepperoni pizzas

10. Mixtures Can be physically separated by 1.Distillation 2.Magnet 3.Centrifuge 4.Filtration 5.Evaporation

11. ELEMENTSCOMPOUNDSMIXTURES

12. Mixtures Can be heterogeneous (see diff pieces) or homogeneous (uniform appearance) solutionsHomogeneous mixtures are called solutions suspensionsHeterogeneous mixtures include suspensions Colloids are classified as heterogeneous in some books and homogeneous in others

13. Solutions – look the same throughout From Chem4kids How much solute can dissolve in water? Solubility graph can tell you 1.Most compounds show a(n) ________ in solubility as temp. inc. 2.Which compound shows the greatest increase in solubility as temp inc? 3.Which compound(s) actually dec in solubility as temp inc.? 4.How much potassium nitrate will dissolve in 100 ml of water at 40 o C? 5.How much sodium nitrate will dissolve in 100 ml of water at 90 o C?

14. Solubility Graph 1.Which compound shows the greatest increase in solubility as temp inc? 2.Which compound(s) actually decrease in solubility as temp inc.? 3.Which compound has the highest solubility at 58 o C?

15. Fill-in the Venn diagram with characteristics.

16. Do not settle out Pass thru filter paper Settle out on standing Separate w/filter paper Largest particle size (seen) Ex: blood, muddy water, Italian salad dressing Scatter light Don’t scatter light/ light passes right thru Smallest solute particles mixtures Medium particle size Don’t easily pour Ex: Jell-o, fog, milk, mayo, whipped cream Ex: Kool- aid, salt water, brass Can pour some