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Week 9 CCA Test Review

Week 9 CCA Test Review. Labeling an atom. Electron. Neutron. Proton. Nucleus. Energy Level. Fill in the table:. Positive. 1 amu. Electron. 1 amu. No charge. What is the atomic mass?. Atomic mass: the mass of an atom. Protons + Neutrons Atomic Mass. What is the atomic number?.

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Week 9 CCA Test Review

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  1. Week 9 CCA Test Review

  2. Labeling an atom Electron Neutron Proton Nucleus Energy Level

  3. Fill in the table: Positive 1 amu Electron 1 amu No charge

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

  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? • Electrons 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 3 positive charges 3 negative charges Remember: all elements on the periodic table are neutral!

  9. Fill in the missing information 4 2-8-8 Rule Octet Rule 9 - 4 = 5 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 bond • 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 Remember to cover the one on the two digit numbers!

  23. Most reactive groups Group 1 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). Group 17

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

  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 1st group = 1 valence electron

  32. Boron – Valence Electrons 2nd Period = 2 energy levels

  33. Oxygen Bohr Model

  34. Review from Unit 1 Physics

  35. Newton’s 3 Laws • An object at rest will stay at rest, and an object in motion will stay in motion unless acted upon by an outside force • F=ma • 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

  38. Add: • Differences between speed, velocity, and acceleration • Speed = Distance/Time • Velocity: Speed and direction • Acceleration: Speed up, slow down, change direction

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