Unit 2 Exam Note/Sample Questions

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1 Unit 2 Exam Note/Sample Questions READ THIS NOTE: You will be provided with a periodic table on the exam. The one you will be receiving is the one at this URL: However, the labels of Lanthanide series and Actinide series will be blocked out, so REMEMBER where they are. You will be allowed to use a calculator in this exam. Either bring your own (it cannot be a graphing or programmable calculator only a scientific calculator will be allowed) or one will be provided for you. I cannot guarantee that you will receive a scientific calculator if you do not bring your own. You may not use your phone as a calculator. The test will be MOSTLY multiple-choice (4 choices: A, B, C, D) as many students have requested this. This does NOT mean you should use multiple-choice as a crutch to study less. You are still expected to know WHY and HOW the things we studied work the way they do these will be asked during the test AS FREE RESPONSE QUESTIONS (where you write complete sentences to explain your answer). The test will take the whole period (~75 minutes) so come prepared on time to class. If you are late, you will not receive any extra time to take the exam. Below are some sample test questions. Answer keys will be uploaded later tonight. I may put up more practice questions but ONLY IF I see enough people visiting the website to study. Some of these questions may appear on your test except with the numbers changed around, so I highly recommend knowing how to solve each and every single problem on here. STUDY YOUR OLD QUIZZES THE ANSWER KEYS ARE ONLINE. Use Google, Wikipedia, Yahoo Answers, your friends, your notes, my reference guide whatever will help you succeed on this exam. Good luck! The Atom/Energy Levels/Subshells 1. The two main regions of an atom are the a. Principal energy levels and energy sublevels b. Nucleus and kernel c. Nucleus and energy levels d. Planetary electrons and energy levels 2. The lowest principal energy level number is a. 0 b. 1 c. 2 d The sublevel with only one orbital is called a. s b. p c. d d. f 4. The sublevel that can hold up to 10 electrons is called

2 a. d b. f c. p d. s 5. The total number of ORBITALS (hint: NOT electrons) in the 2 nd principal energy level (n = 2) is a. 1 b. 9 c. 16 d Valence electrons are a. All electrons in an atom beyond n=1 b. All of the outermost electrons of a subshell c. All electrons in l=2 d. All electrons in an atom Atomic Number/Mass Number 7. A neutral atom of Oxygen has 8 protons, 10 neutrons, and 8 electrons. The mass number of this atom is a. 8 b. 10 c. 18 d An alpha particle is a Helium atom with 2 protons, 2 neutrons, and 0 electrons (+2 overall charge). Its atomic number is a. 2 b. 4 c. 0 d. It has no atomic number because charged atoms do not have one 9. has how many neutrons? a. 13 b. 6 c. 19 d has how many protons? a. 13 b. 6 c. 19 d If an atom loses an electron, what does the atomic number change by? a. +1 b. 0 c. -1 d A neutral atom has a mass number of 35 and an atomic number of 15. How many electrons does it have? a. 15 b. 20

3 c. 35 d An atom with a +2 charge has an atomic number of 33 and a mass number of 50. How many electrons does it have? a. 17 b. 33 c. 31 d. 50 Isotopes 14. Isotopes of platinum have different a. Atomic numbers b. Atomic masses c. Numbers of electrons d. Number of protons 15. and differ in structure by a. 3 electrons b. 3 isotopes c. 3 protons d. 3 neutrons 16. Isotopes of an element ALWAYS have the same a. Number of electrons b. Number of protons c. Number of neutrons d. Number of positrons The following 3 questions are based off of the following paragraph: Oxygen has 3 isotopes: Oxygen-16, Oxygen-17, and Oxygen-18. Oxygen-16 s atomic mass is amu and is 80% of all Oxygen. Oxygen-17 s atomic mass is amu and is 15% of all Oxygen. Oxygen- 18 s atomic mass is amu and is 5% of all Oxygen. 17. What is the atomic mass of Oxygen-16? a. 16 amu b. 16 c. 8 d amu 18. What is the mass number of Oxygen-18? a. 18 amu b. 18 c. 8 d amu 19. (Worth 3 points) What is the average atomic mass of Oxygen closest to? a amu b amu c amu d. 16 amu Periodic Table 20. The most reactive elements are called the

4 a. Transition metals b. Alkaline-Earth metals c. Metals d. Alkaline metals 21. The least reactive elements are located in a. Group 1 b. Group 2 c. Group 17 d. Group The noble gases are a. Not reactive b. Non-metals c. Extremely reactive d. Both a and B 23. The lanthanides and actinides are a. Extremely reactive b. Not reactive c. Radioactive d. In groups 15 and Unlike metals, non-metals are a. Lustrous b. Excellent insulators of heat and electricity c. Ductile and malleable d. Excellent insulators of heat and electricity 25. The most reactive non-metals are called the a. Noble gases b. Transition elements c. Oxygen family d. Halogens Periodic Trends The following 3 questions deal with how the atom changes as you move in different directions on the Periodic Table 26. Electronegativity increases as you move a. Up, Right b. Up, Left c. Down, Right d. Down, Left 27. Atomic radius increases as you move a. Up, Right b. Up, Left c. Down, Right d. Down, Left 28. Ionization energy increases as you move a. Up, Right b. Up, Left c. Down, Right d. Down, Left

5 29. Which of the following is the most electronegative? a. O b. Si c. P d. S e. N 30. Which of the following is the least electronegative? a. H b. Li c. Na d. K 31. Which of the following is the least electronegative? a. Cl b. F c. O d. S e. Ne 32. Which of the following has the greatest ionization energy? a. He b. Ne c. Ar d. Kr 33. Which of the following has the greatest ionization energy? a. He b. H c. F d. O 34. Which of the following has the lowest ionization energy? a. Li b. Be c. B d. C 35. Which of the following has the greatest atomic radius? a. K b. Rb c. Cs d. Fr 36. Which of the following has the smallest atomic radius? a. Al b. Si c. P d. S 37. The atomic radius increases as you move down the periodic table because a. The atom gains more energy levels b. The atom gains protons c. The atom gains more neutrons d. A and B

6 38. The ionization energy increases as you move to the right of the periodic table because a. The atom gains more energy levels b. The atom gains more protons c. The atom gains more neutrons d. A and B 39. Shielding is when a. The energy levels protect the nucleus b. The outer energy levels push the inner energy levels closer to the nucleus c. The inner energy levels push the outer energy levels further from the nucleus d. The valence electrons get ionized 40. Electronegativity is a measure of a. How much energy it takes for an electron to leave the atom b. How strongly the atom pulls on electrons c. How large the atom is d. A and B