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Chemistry Unit 2

Chemistry Unit 2. Practice Test. Indicator 1: Calculate PNE. 1. Which atom contains exactly 30 protons? A. Ca – 30 B. Co – 59 C. Zn – 65 D. Br – 80. HINT: What is Element 30?. Indicator 1: Calculate PNE.

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Chemistry Unit 2

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  1. Chemistry Unit 2 Practice Test

  2. Indicator 1: Calculate PNE 1. Which atom contains exactly 30 protons? A. Ca – 30 B. Co – 59 C. Zn – 65 D. Br – 80 HINT: What is Element 30?

  3. Indicator 1: Calculate PNE 2. What is the total number of subatomic particles in a neutral atom of Beryllium? • 4 • 9 • 13 • 17 Hint: How many protons, neutrons and electrons does it have? Add them!

  4. Indicator 1: Calculate PNE 3. Compared to the charge and mass of an electrons, a proton has • The same charge and a smaller mass • The same charge and a greater mass • The opposite charge and a smaller mass • The opposite charge and a greater mass Make a Table to compare: Charge Mass Protons Electrons Then treat the answer choices like True/False.

  5. Indicator 1: Calculate PNE 4. Using the Periodic Table, how many neutrons would the most common isotope of Cobalt have? • 27 • 31 • 32 • 59 Hint: Look up Cobalt Element #27 – Mass 59 59 – 27 = ???

  6. Indicator 1: Calculate PNE 5. How many protons are in Si-28? • 42 • 28 • 14 • 2 Hint: Look up Si Element #14 So there are how many protons???

  7. Indicator 1: Calculate PNE 6. What is the atomic mass of an element with 17 electrons, 19 protons and 13 neutrons? • 32 • 30 • 19 • 13 Hint: Atomic mass is protons + neutrons 19 + 13 = ???

  8. Indicator 2: Ion / Isotope 7. Given Element A has 7 protons, 7 neutrons and 7 electrons and Element B has 6 protons, 7 neutrons and 8 electrons which statement is true? • Elements A and B have the same mass. • Element A and B have the same number of subatomic particles. • Elements A and B are isotopes of the same element. • Elements A and B have the same number of electrons in the outer energy level • Hint: Make a chart to compare A and B • P • N • E • Then – treat the answer choices like true/false.

  9. Indicator 2: Ion/Isotope 8. What is the isotope notation 2 for an element with 11 protons, 13 neutrons and 11 electrons? • Al-13 • Na-11 • Al-24 • Na-24 Hint: Isotope notation 2 is Symbol – Mass Symbol is the number of protons (11) = ??? [Sodium] Mass is protons + neutrons: 11 + 13 =???

  10. Indicator 2: Ions / Isotopes 9. What is the charge of an atom that has lost an electron? • 1+ • 1- • 2+ • 2- Hint: Loosing an electron creates a ??? Charge, gaining electrons create a ??? Charge – What charge do electrons have????

  11. Indicator 2: Ions / Isotopes 10. What is defined as having a different number of neutrons and therefore a different atomic mass? • An ion • An isotope • Stable • Element Hint : different neutrons = ???

  12. Indicator 3: Diagrams 11. How many electrons does Calcium have in its outer energy level? 2 4 8 10 Hint: Valence electrons = electrons in outer energy level.

  13. Indicator 3: Diagrams 12. An ion with 6 protons, 7 neutrons and a charge of 2+ would have how many electrons? A. 4 B. 6 C. 7 D. 8 Hint: 6 – 2+ = ???

  14. Indicator 3: Diagrams 13. In a filling the electron shells, where do electrons ‘go’ after you fill level 3p? • 3d • 4s • 2p • 2d Hint: Look at the Electron Configuration Chart!!!

  15. Indicator 4: Periodic Table 14. What element is in Group 13, Period 2? • Boron • Aluminum • Sodium • Magnesium Hint: Group is the column, period is the row – read the periodic table!

  16. Indicator 4: Periodic Table 15. Which element is a metal? • Potassium • Iron • Silicon • Bromine Hint: Look at the periodic table color coding – treat the answers like true/false.

  17. Indicator 4: Periodic Table 16. Carbon and Sulfur are similar in that they both • Have the same ionization energy • Are transition metals • Are non-metals • Are gases Hint: find Carbon and Sulfur – identify they are both Non-Metals – treat the answers like true/false.

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