3. What is the smallest particle of an element that has the properties of that element?
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1 semester one exam review Name Date Hr 1. What is the difference between elements, molecules and compounds? 2. What is the difference between compounds and molecules? 3. What is the smallest particle of an element that has the properties of that element? 4. Highlight the compounds in the list below. C CO 2 Fe H 2 O H 2 SO 4 Au Pb NH 3 O 3 H 2 ATOMIC STRUCTURE 5. What is the name, abbreviation and charge of the particles in an atom? 6. What is the maximum number of electrons the first energy level can hold? 2 nd level? 3 rd level? Fill in the following information then draw each atom 7. Calcium # of energy levels 8. Nitrogen # of energy levels 9. Magnesium # of energy levels 10. Helium # of energy levels 11. Neon # of energy levels 12. What are isotopes? 13. What is the mass number of a carbon atom with 6 protons, 8 neutrons and 6 electrons? 14. Atom A has 9 protons, 10 neutrons, and 9 electrons. Atom B has 8 protons, 10 neutrons, and 8 electrons. Are these two atoms isotopes? Why or Why not? 15. Atom A has 17 protons, 19 neutrons, and 17 electrons. Atom B has 17 protons, 18 neutrons and 17 electrons. Can these two atoms be isotopes of the same element? Why or Why not?
2 16. How many types of atoms can you expect to find in a sample of any element? 17. Compare the mass of a proton to the mass of electrons. 18. Where is most of the mass in an atom? 19. What are the two major parts of an atom and their charges? 20. What is the difference between the atomic number and the mass number? 21. What is the difference between atomic mass and mass number? PERIODIC TABLE 22. How is our modern periodic table organized? 23. What are the three regions of the periodic table? 24. Indicate metal, metalloid, or nonmetal next to each element listed below. A. arsenic B. tin C. osmium D. xenon E. calcium F. boron G. rubidium H. praseodymium 25. Is hydrogen a metal or nonmetal? Why? 26. What are group 17 elements called? 27. Which group of elements are all gases at room temperature? 28. Elements in the same on the periodic table have similar properties. 29. Which of the following sets of elements are most similar in their chemical properties: a) C,N,O b) P,As,Pb c) Mg,Ca,Ba d) Zn,Pd,Ag Acids and Bases 30. Circle the bases and underline the acids in the following list of molecules. NaOH HCl KOH H 2 SO 4 Ca(OH) 2 H 3 PO 4 HNO 3 HBr H 2 S NH 4 OH 31. What is the name of the reaction when an acid and a base react? 32. Acid + Base +. Fill in the blanks with the correct products of an acid base reaction 33. Read pages What kind of lakes are protected against the negative effects of acid rain? 34. What color will blue litmus paper turn show as presence of an acid? 35. What color will blue litmus paper show as in the presences of a base? 36. When blue litmus paper is dipped into a solution of toilet bowl cleaner, it turns red. a. Is toilet bowl cleaner an acid or a base? b. Is its ph >7,<7, or =7?
3 37. Use table 1 to answer the following questions. Place the substances in Table 1 in the appropriate columns. Table 1 ACID BASE substance ph vinegar 1 hydrogen peroxide 6 antacid 8 distilled water 7 corn starch 5 sodium hydroxide 11 soap 5 laundry detergent During an acid base test of limestone with phenolphthalein, the phenolphthalein turned purple. What does this tell you about the limestone? CHEMICAL BONDING AND NAMING Directions: Write formulas for the following: 39. lithium and phosphorus 40. calcium and chlorine 41. barium and nitrogen 42. sodium and sulfur 43. aluminum and oxygen Directions: Which type of bond (ionic or covalent) would be formed between each of the following: 44. sodium and chlorine 45. carbon and bromine 46. oxygen and fluorine 47. lithium and bromine 48. silver and oxygen 49. calcium and nitrogen Directions: Draw Lewis Structures for the following then show the correct bonding (for ionic show the electron transfer with arrows; for covalent sharing of electrons with lines). 50. lithium and nitrogen 51. carbon and iodine 52. magnesium and chlorine 53. oxygen and fluorine Directions: Write correct names for the following formulas. 54. LiBr 55. Na 2 O 56. K 3 N 57. CaBr 58. Ba 3 N 2
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