1. Directions: Click “Slideshow” then “From Beginning” to view this slideshow properly. Take notes and answer questions from every page. Include subheadings for each separate topic. Write down any questions you have about something you may not understand. Elements & Compounds Lab Reassessment Review

2. Objectives: 1.There are billions of materials in our universe. 2.Those pure materials are called elements which are represented by a symbol and models. 3.Elements combine in thousands of ways to make compounds which are represented by formulas and models. Elements & Compounds

3. An element is a substance that is made from one kind of atom only. It cannot be broken down into simpler substances. An element atom

4. A compound is a substance that is made from two or more elements that chemically join. atom A compound made up of 2 different elements A compound made up of 7 different elements

5. Although it is very difficult, because a compound is made of more than one element it can be broken down into those separate elements. A compound made up of 3 different elements An element

6. MaterialMade up of:Element or compound Water Hydrogen and Oxygen compound Coal Carbon element Carbon dioxide Carbon and Oxygen compound Oxygen element Chalk Calcium, Carbon & Oxygen compound Wax Carbon & Hydrogen compound Table salt Sodium & Chlorine compound Caffeine Carbon, Hydrogen, Nitrogen & Oxygen compound

7. MaterialMade up of:Element or compound Water Hydrogen and Oxygen compound Coal Carbon element Carbon dioxide Carbon and Oxygen compound Oxygen element Chalk Calcium, Carbon & Oxygen compound Wax Carbon & Hydrogen compound Table salt Sodium & Chlorine compound Caffeine Carbon, Hydrogen, Nitrogen & Oxygen compound

8. Objective: To learn the symbols and recognize models of elements and compounds. Representing Elements & Compounds

9. Look in your periodic table and find the symbols that represent the following elements: Sodium …….. Iron ……….. Hydrogen ……….. Chlorine ……….. Carbon …………

10. Now look in your periodic table and find name that corresponds to the following symbol: Fe …….. Mg ……….. Br ……….. K ……….. Li …………

11. Can you answer these??? Q1. The symbol of Nitrogen is: a. Nab. Nc. Ni Q2. Hg is the symbol of: a.Hydrogenb. Heliumc. Mercury Q3. Water is not in the periodic table because: a. It is a liquid substanceb. It is a natural substance c. It is a compound not an element

12. Yes!!! Q1. The symbol of Nitrogen is: a. Nab. Nc. Ni Q2. Hg is the symbol of: a.Hydrogenb. Heliumc. Mercury Q3. Water is not in the periodic table because: a. It is a liquid substanceb. It is a natural substance c. It is a compound not an element

13. Modeling Elements Elements can also be represented by models. Because they are made of only one type of atom they will be represented by all the same shapes and colors. H 2 = Hydrogen O 2 = Oxygen HH OO

14. Modeling Compounds When different elements combine they will create a compound and usually are represented by a different shape or color. Cu S O O O

15. Compounds are also represented by chemical formulas by combining the element symbols that make them up. What elements make up this compound? MgCl 2 1 magnesium and 2 chlorine

16. AgNO 3 What elements make up this compound? 1 silver, 1 nitrogen, and 3 oxygen

17. Draw each and label it as an Element or a Compound AND explain why.

18. Now it’s your turn! Create your own way to represent an element and a compound. You may draw it or build it but be sure to turn it in with your notes. Have fun!