1. Chapter 4 Lesson 1

2. Today You Need: 4.1 Notes handout (glued in on the right side!) Pencil or pen 3 colored pencils, pens, or highlighters

3. What is Matter? Anything that has MASS and takes up SPACE Examples of matter? The smallest unit of matter is the ATOM Right Side

4. “Atom” From the Greek word atoma, meaning “INDIVISIBLE”. Right Side

5. Think – Write - From the Greek word atoma, meaning “indivisible”. Using this definition, predict why the atom was called the atom. {Complete Sentences!} Left Side My Prediction:

6. Pair – Write Share with your partner. Write down their thoughts in a new color. Left Side My Prediction:My Partner’s Prediction:

7. “Atom” From the Greek word atoma, meaning “indivisible”. Greek Philosopher Democritus could believed that you could only cut matter up a certain amount of times before it was too small to be divided. Right Side

8. Parts of the Atom All Atoms are mostly EMPTY SPACE surrounding a tiny NUCLEUS. “subatomic particles” – particles that are SMALLER than an atom There are 3 main subatomic particles. Protons, Neutrons, Electrons Right Side

9. Protons Use your first color to highlight or shade behind the word “Protons” on your handout. Symbol: P+ Charge: + 1 Mass ~ 1 amu Right Side

10. Units What units do we use for measuring distance? What units do we use for measuring mass? Left Side

11. Units What units do we use for measuring distance? Inches, centimeters, miles, kilometers, yards… What units do we use for measuring mass? Pounds, ounces, grams amu: ATOMIC MASS UNIT = for measuring mass Left Side Right Side

12. Neutrons Use your 2nd color to highlight or shade behind the word “Neutrons” on your handout. Symbol: N Charge: 0 (Neutrons are Neutral) Mass ~ 1 amu Right Side

13. Electrons Use your 3rd color to highlight or shade behind the word “Electrons” on your handout. Symbol: e- Charge: - 1 Mass ~ 0 amu Right Side

14. AMU repeat What is amu? Atomic mass unit Use to measure mass of subatomic particles. Right Side

15. Create a Chart Create a chart that shows the symbol, charge, and mass (amu) Left Side

16. Create a Chart Create a chart that shows the symbol, charge, and mass (amu) Left Side ParticleSymbolChargeMass (amu) protonP++ 11 neutronN01 electrone-- 10

17. Lithium Atom: 3P+, 4N, 3 e- Use your 3 colors: 1 color for Protons, P+ 2 nd color for Neutrons, N 3 rd color for electrons, e- Right Side

18. Draw a new atom Draw Berylium, Be Be has 4 protons, 4 electrons, and 5 neutrons. Don’t forget to color-code the subatomic particles. Left Side