1. Compounds Chapter 3 Section 2

2. Lesson Objectives Define Compound Describe How Elements Combine to Form Compounds Use Properties to Determine the Identity of a Compound

3. Keywords: Pure Substance Compound Chemical Change Specific Ratios Physical and Chemical Means Chemical Means Define Compound Describe How Elements Combine to Form Compounds Use Properties to Determine the Identity of a Compound

4. Keywords: Pure Sunstance A pure substance created when two or more elements chemically combine Ex: Magnesium + Oxygen  Magnesium Oxide Define Compound Describe How Elements Combine to Form Compounds Use Properties to Determine the Identity of a Compound

5. Keywords: Compounds Define Compound Describe How Elements Combine to Form Compounds Use Properties to Determine the Identity of a Compound

6. Keywords: Compounds Define Compound Describe How Elements Combine to Form Compounds Use Properties to Determine the Identity of a Compound

7. Are you now able to…. I still feel unsure. I need some more help to understand. I feel ok. I need to do some more work on my own to check my understanding. I am happy and feel I understand and can explain the main points. Define Compound. Define Compound.

8. Keywords: Chemical Change Define Compound Describe How Elements Combine to Form Compounds Use Properties to Determine the Identity of a Compound In order for a compound to form, the elements must REACT and undergo a chemical change. Once they combine, they have different properties because they are a totally different substance.

9. Keywords: specific ratios Define Compound Describe How Elements Combine to Form Compounds Use Properties to Determine the Identity of a Compound When elements combine, they combine in specific ratios Ex: Water: 2 atoms of Hydrogen (1 g each) will combine with one atom of Oxygen (16g) Mass Ratio of Water 2:16 or 1:8 when reduced Mass ratio never changes!!

10. Are you now able to…. I still feel unsure. I need some more help to understand. I feel ok. I need to do some more work on my own to check my understanding. I am happy and feel I understand and can explain the main points. Use Properties to Determine the Identity of a Compound

11. Keywords: specific ratios Define Compound Describe How Elements Combine to Form Compounds Use Properties to Determine the Identity of a Compound Compounds have their own physical properties just like elements do. Ex: Melting points, boiling points, etc Compounds can also be identified by chemical properties. Ex: React with acids, react with water, react with light, etc.

12. Keywords: Chemical Means Define Compound Describe How Elements Combine to Form Compounds Use Properties to Determine the Identity of a Compound Compounds can be broken down. Some compounds can be broken into the elements that make them up. This can only be done by chemical means. Ex: Heating, electricity

13. Keywords: Chemical Means Define Compound Describe How Elements Combine to Form Compounds Use Properties to Determine the Identity of a Compound Compounds cannot be broken down by physical means. Ex: You can not filter water to get H and O You can not ground salt to get Na and Cl

14. Are you now able to…. I still feel unsure. I need some more help to understand. I feel ok. I need to do some more work on my own to check my understanding. I am happy and feel I understand and can explain the main points. Describe How Elements Combine to Form Compounds