Chapter 2 jeopardy review
- 1. Atomic Chem General Chem Water Chem Energy Misc. 5 pt 5 pt 5 pt 5 pt 5 pt 10 pt 10 pt 10 pt 10 pt 10 pt 15 pt 15 pt 15 pt 15 pt 15 pt 20 pt 20 pt 20 pt 20 pt 20 pt 25 pt 25 pt 25 pt 25 pt 25 1 pt
- 2. What 2 subatomic particles are contained in an atom’s nucleus? 2
- 3. Protons and Neutrons 3
- 4. What two subatomic particles must differ in number in order to have an ion? 4
- 6. The atomic number of an element is always the same as the number of this subatomic particle. 6
- 7. Protons= Atomic Number This is why you look for the number of protons when you are identifying an atom on a drawing 7
- 8. What do you call atoms of an element that contain different numbers of neutrons? Example: carbon-12 and carbon-14 8
- 9. Isotopes 9
- 10. Strontium (Sr) has a mass number of 88 and an atomic number of 38. Give the number of protons, electrons, and neutrons in an atom of Strontium. 10
- 11. Protons = 38 Electrons = 38 Neutrons = 50 11
- 12. How many valence electrons does an atom of phosphorus (P) have? 12
- 13. 5 valence electrons 13
- 14. _______________ are made up of atoms of two or more elements in fixed proportions. 14
- 15. Compounds 15
- 16. Why are the noble gases stable? 16
- 17. A noble gas is stable because its outer electron energy level is full (has maximum number of valence electrons). 17
- 18. Na2CO3 is the chemical formula for sodium carbonate. How many atoms of each element are present in sodium carbonate? 18
- 19. Na = 2 C=1 O=3 19
- 20. Differentiate between covalent and ionic bonds. Hint: What is going on with the electrons in each type of bond? 20
- 21. •In covalent bonds, electrons are shared. •In ionic bonds, one atom donates its electrons, becoming a positive ion. The other atom accepts the electrons, becoming a negative ion. The ions of opposite charges are then attracted to one another. 21
- 22. Water is referred to as a __________ molecule because it has an unequal distribution of electrical charge. 22
- 23. polar 23
- 24. What is the term for water molecules being attracted to any other substance? Hint: This is what happened when we dropped water on the glass slide. 24
- 25. Adhesion 25
- 26. Do lipids dissolve in water? 26
- 27. No! Lipids do not dissolve in water because they are nonpolar. Ionic compounds and polar molecules dissolve best in water. 27
- 28. Did the paperclip float? Explain what water properties contributed to the results we saw in the lab. 28
- 29. It did not float. It sat on top of the water due to water’s surface tension. Surface tension is the result of cohesion between water molecules. Cohesion or sticking together of water molecules is caused by hydrogen bonding. 29
- 30. Differentiate between acids and bases. Hint: What ions are released in water and what are their pH values. 30
- 31. •Acids form H+ when dissolved in water. They have pH values below 7. •Bases form OH- ions when dissolved in water. They have pH values above 7. 31
- 32. Define energy 32
- 33. The ability to do work (move or change matter). 33
- 34. What is the name for the starting materials in chemical reactions? What is the name of the newly formed substances in chemical reactions? 34
- 35. Reactants = starting materials Products = newly formed substances 35
- 36. What name is given to the energy needed to start a chemical reaction? 36
- 37. Activation energy 37
- 38. Define an enzyme (what does it do?) 38
- 39. Enzymes are biological catalysts that increase the speed of chemical reactions. Catalysts reduce the activation energy of a chemical reaction. 39
- 40. Name the 4 types of Energy in Biological Systems 40
- 41. Chemical Energy Thermal Energy Electrical Energy Mechanical Energy 41
- 42. What is defined as, “anything that occupies space and has mass?’ 42
- 43. Matter 43
- 44. What are the weak interactions that allow water to cohere and adhere? 44
- 45. Hydrogen Bonds 45
- 46. What is a strong bond in which valence electrons are shared? Name the 3 types of these bonds 46
- 47. Covalent Bond Single covalent bond (2 electrons shared) Double covalent bond (4 electrons shared) Triple covalent bond (6 electrons shared) 47
- 48. The force that describes attraction between molecules of the same substance. 48
- 49. Cohesion 49
- 50. What is an acid-base indicator ? Name 3 natural acid-base indicators. 50
- 51. An acid-base indicator is a dye used to distinguish between acidic and basic solutions by means of the color changes it undergoes in these solutions. 3 Natural Examples: • tea • red cabbage juice • concord grape jelly 51
Editor's Notes
- #2: Eleanor M. Savko 10/12/12