2. The charge of an atom with all of its electrons is ___________

3. An iron atom has an atomic mass of 56 its atomic number is 26. How many neutrons does the iron atom have?

4. An element’s atomic number is equal to its number of ____?

5. Two different isotopes of an element have different _____.

6. What is the mass number of an element that has 19 protons, 19 electrons and 20 neutrons?

7. In the Bohr model the energy levels are represented by ________.

8. When an electron gains energy it is said to be __________.

9. The first energy level can hold ______electrons.

10. A sodium atom which has 11 electrons has ________ electrons in its third energy level.

11. Which of the following is not a type of orbital? s d p x

12. An electron jumps to a different energy level when it ______(phrase).

13. The number of energy levels filled in an atom is determined by ______.

14. These are found in the outer energy level of an atom.

15. Unit or quantum of light

16. What does the word “atom” mean?

17. Who came up with the “plum pudding Model”?

18. Democritus’s original atomic theory was revised because it : a. Claimed matter is made of atoms b. claimed atoms could be divided c. explained what electrons are d. did not have a scientific basis

19. Which of these statements is not part of Dalton’s atomic theory? a.Atoms cannot be divided b.Atoms of an element are alike c.Atoms are made of electrons d.Atoms of different elements form compounds

20. A subatomic particle that has a negative charge is called a ______.

21. Who determined that atoms could be divided?

22. Thomson made his discovery about the atom during an experiment using _________________.

23. Thomson is responsible for discovering that an atom contains ______.

24. What charge do Protons have?

25. What charge do neutrons have?

26. What is an atom’s nucleus made of?

27. Whose model determined that an atom’s positive charge is concentrated in the atom’s center?

28. The smallest part of an element that still has the properties of that element is a (an)_____________.

29. Is O 2 an element, a molecule or both?

30. Is NH 3 an element, a compound or both?

31. How was the idea for hot air balloons discovered?

32. Is water a mixture or pure substance?

33. Why does helium not fall under the octet rule?

34. How do you determine an atom’s mass?

35. Oxygen’s atomic number is 8. This means that it has 8 _______and _____.

36. A mole is an SI base unit that describes the: a.Mass of a substance b.Amount of a substance c.Volume of a substance d.Electric charge of a substance

37. The average atomic mass of potassium is approximately 39u. What is the mass of 2.0 mol of potassium?

38. You have 6.50 moles of chromium, which has a molar mass of approximately 52 g/mole. What is the mass in grams of this amount of chromium?

39. Which statement about the modern model of the atom is not true? a.Electrons can be found between energy levels b.Electrons can be found only in certain energy levels. c.The approximate location of electrons cannot be predicted d.Electrons are most likely to be found in orbitals

40. The first theory of atoms, proposed by _______, suggested that the universe was made of units that could not be divided.

41. The nucleus of an atom has a ___ charge.

42. Isotopes of an element have the same atomic ________but different atomic ______.

43. The _____ is the SI unit that is used for counting small particles, such as atoms.

44. The molar mass of krypton is 83.80 g/mole. The mass of 5.00 moles of krypton is __________g.

45. The number of energy levels that are filled in atoms is determined by the number of ______.

46. Explain the difference between the Bohr model of the atom and the modern model.

47. Sodium would likely form what ion with what oxidation number?

48. Group 1 of the periodic table are all ____________ except Hydrogen.

49. What is the location of elements in the periodic table related to?

50. Elements that have one valence electron tend to_______.

51. Atoms that gain or lose electrons are called ____.

52. Group 17 elements form _______.

53. Most elements are: a. metals b. non metals c. metalloids d. not found in nature

54. What is the chemical symbol of manganese?

55. As you move from left to right on the periodic table, ______ increases.

56. What does every element in a group have in common?

57. What does every element in a row have in common?

58. Who came up with the periodic table?

59. Which group is made up of the noble gases?

60. Which groups have three valence electrons?

61. Why do crystals have such a high melting point?

62. What type of elements form ionic bonds?

63. What type of elements form Covalent bonds?

64. What ion would Chromium form?

65. What kind of bonds hold water together?

66. Hydrogen and carbon would form what kind of bonds?

67. What kind of ion would Phosphorus form?

68. What would be the chemical formula when Phosphorus and Sodium bonds?

69. What are the main elements that make up the human body?

70. What kind of bond would Silver and Chlorine form?

71. Which of the following is sodium chloride? A. NaBr B. NaCl C. KCl D. LiCl