1. Week 9 CCA Test Review

2. Labeling an atom Electron Proton Neutron Nucleus Energy Level

3. Fill in the table: Subatomic Particles Charge Proton Negative 0 amu Neutron Positive Electron No charge 1 amu

4. What is the atomic mass? Protons + Neutrons Atomic Mass Atomic mass: the mass of an atom

5. What is the atomic number? Atomic number: Element number used to show where on the periodic table the element is found. Also, it is the number of protons. Atomic Number = Number of Protons

6. What are valence electrons? Atoms in the outside energy level, used to determine reactivity of an atom

7. How can you find the number of neutrons? Atomic Mass - Atomic Number (protons) Neutrons

8. How do you know if an atom is neutral? Protons (positive charges) = Electrons (negative charges) If it has the same number of positive (protons) and negative (electron) charges Remember: all elements on the periodic table are neutral! 3 positive charges 3 negative charges

9. Fill in the missing information Atomic Mass9 Atomic Number Protons4 Neutrons Electrons4 Energy Levels? Valence Electrons Is this a stable atom? Is this a neutral atom? Element? Element symbol? 4 9 - 4 = 5 2-8-8 Rule Octet Rule 2 2 No - Valence level is not full Yes – protons = electrons Beryllium Be

10. Bohr Model

11. Octet (2-8-8) Rule First energy level can hold 2 electrons Second energy level can hold 8 electrons Third energy level can hold 8 electrons

12. What do valence electrons determine? They determine how reactive an atom is 1 and 7 valence electrons – most reactive 8 valence electrons – least reactive Determine how am atom will bond 1 valence electron – give away 7 valence electrons - steal

13. What is an ionic bond? When does this happen Ionic bond: when valence electrons are given or taken in order for elements to bone This happens when an atom needs to give or take 1, 2, or 3 valence electrons to be stable

14. What is an covalent bond? When does this happen? Covalent bond: when atoms bond by sharing valence electrons This happens when atoms share and become stable

15. How is the Periodic Table arranged? By atomic number (number of protons) Groups (valence electrons) and Period (energy levels) Physical and Chemical properties

16. Color Metals, Non-Metals, and Metalloids

17. Put a circle around the non metals that are gasses

18. Label Groups and Periods

19. Most reactive groups Group 1 Group 17

20. Least Reactive Group Noble Gasses – Group 18

21. What information can be found if you know the Period of an element? Number of energy levels

22. What information can be found if you know the group of an element? Number of valence electrons Remem ber to cover the one on the two digit number s!

23. Most reactive groups Group 1 Group 17 Why? Group 1 only has one valence electron and group 17 only has 7. They are both 1 valence electron away from being stable (happy).

24. Least Reactive Group Noble Gasses – Group 18 Why? Group 18 has 8 valence electrons which fills up the valence level, meaning the atom is stable (happy)

25. Why do elements with similar valence level of electrons have similar chemical properties? They will react the same way, because they have the same number of valence electrons

26. What has similar physical and chemical characteristics to Nitrogen? Any element that is in the same family/group Nitrogen Family

27. Argon - Protons Remember: Atomic number = protons Protons = 18

28. Sodium – Atomic Mass Atomic Mass = 22 (drop the decimals)

29. Carbon - neutrons Remember: Atomic mass – atomic number = neutrons Neutrons = 6

30. Neon – atomic number Atomic Number = 10

31. Potassium – Valence Electrons Valence electrons - 1 1 st group = 1 valence electron

32. Potassium – Valence Electrons Energy Levels Used - 2 2 nd Period = 2 energy levels

33. Oxygen Bohr Model

34. Review from Unit 1 Physics

35. Newton’s 3 Laws 1. An object at rest will stay at rest, and an object in motion will stay in motion unless acted upon by an outside force 2. F=ma 3. For every action there is an equal and opposite reaction

36. Balanced and Unbalanced Forces Balanced – not moving Unbalanced – moving (creates a net force)

37. Equations Speed = D/T Acceleration = change in speed/change in time Force = ma Work = Force x distance