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Semester Review

Semester Review. What are the 3 subatomic particles that make up an Atom?. Protons Neutrons Electrons. Protons- Nucleus (Mass) Neutrons- Nucleus (Mass) Electrons- Electron Cloud (Volume). Where are they Located?. Proton. Located in the Nucleus Positively charged (+)

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Semester Review

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  1. Semester Review

  2. What are the 3 subatomic particles that make up an Atom? • Protons • Neutrons • Electrons • Protons- Nucleus (Mass) • Neutrons- Nucleus (Mass) • Electrons- Electron Cloud (Volume) Where are they Located?

  3. Proton • Located in the Nucleus • Positively charged (+) • Has a mass of one AMU • The number of Protons determines the Atomic Number • Helps determine the electrical charge • Is added together with the Neutron to determine the Atomic Mass

  4. Neutron • Located in the Nucleus • Is neutrally charged (No charge) • Has a mass of one AMU • Is added together with the proton to determine the Atomic Mass

  5. Electron • Is located in the Electron Cloud (Outside the nucleus) • Is negatively charged ( ) • Has a mass of 1/2000 AMU • Helps determine the electrical charge

  6. What is the Atomic Number? • The number of Protons in a particular element • Identifies the Element • Never Changes Atomic Number 3 Li Lithium 6.94 Atomic Mass • The total mass of the Protons and Neutrons What is the Atomic Mass?

  7. Which element has the most mass? 1 2 3 Which element is not a metalloid?

  8. How do you determine an element’s reactivity? • Valence Electrons • The number of electrons in the outermost energy level • 1 & 7 Highly reactive • 2 & 6 Somewhat reactive • 3, 4, & 5 Slightly reactive • 8 Stable V 1 7 6 2 8 3 4 5

  9. Which element is more reactive? 1 2 3 Which element is stable?

  10. Where are the Metals, Metalloids, & Non-metals? Atomic Numbers increase Metallic Properties Decrease Non-Metals Metals Metalloids What changes as you move left to right?

  11. What elements are in the same group? Elements in the same group are most similar Elements in the same period are equally reactive Same period?

  12. AgNO3 + KCl AgCl+ KNO3 Yield Reactant Product Label the parts of the Chemical Equation Where is the Coefficient? What does it mean? • CH4 + 2 O2 → CO2 + 2 H2O Where is the subscript, what does it mean?

  13. What is the Law of Conservation Mass? In a chemical reaction, the quantity or amount of each element does not change. Yes H2 + O2 -> H2O2 H2CO3 -> H2O + 2CO2 CaCO3 -> CaO + CO2 No Yes Do these equations follow the Law of Conservation Mass?

  14. How many Elements are there? 3 4HNO3 4 20 How many total Atoms are there? How many molecules are there?

  15. What are the signs of a Chemical Reaction? • Unexpected Color Change • Gas Production • Change in Energy (Temp, Light) • Precipitate Formation 18 Grams If 16 grams of Carbon are added to 2 Grams of Oxygen, how much Carbon Dioxide would be formed?

  16. What is the chemical formula for the following model? H O O H H2O2 Ice Melting Nail Rusting Glass Breaking Which shows a new substance being formed?

  17. What is the Net Force? Tug of War Game 50 N 30 N 20 N Unbalanced Forces Why does it move to the right?

  18. If someone runs 100m in 20 sec, what is their speed? 5 m/s If someone drives 50 km/h for 5 hours, What is their distance? d 250 km ÷ ÷ t = Time d = Distance X t S S = Speed

  19. What is the average speed after 6 seconds? No 1 km/sec Is the object accelerating?

  20. A 2500 kg truck and a 800 kg car are racing. The same amount of force is applied to each of them. Which will win?

  21. Which graph best represents the motion of an object whose speed is increasing?

  22. If the two runners go around the track at a constant speed, where will they accelerate? C D B A

  23. Which direction will the drivers tend to move in the collision? Newton’s First Law (Inertia) Why?

  24. Newton’s Laws A. Action/Reaction B. Inertia C. Force and Acceleration 1. 1st Law 2. 2nd Law 3. 3rd Law D. For every action there is an equal and opposite reaction E. Acceleration of an object is directly proportional to the net force & inversely proportional to it’s mass. F. An object in motion will stay in motion, an object at rest will stay at rest unless acted upon by an unbalanced force.

  25. Weather Warm air __________ because it is ________ dense, Cold Air _________ because it is _______ dense. This causes a circular motion called__________. And it is caused by ___________ __________. _______________ gets the majority of the sun’s energy.

  26. Name 3 things that a hurricane needs to form. Warm water (80 deg), Low Pressure, Moist Air It weakens What happens when a hurricane moves across cooler water?

  27. Identify the Air Masses 11 2 4 3 5 6 7 What kind of air comes with it?

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