Ministry of Education Secondary Engagement Program Grade 10 Chemistry Week 4 Lesson 1 - Worksheet Circle the answer that best suites the questions below. 1. Which of the following is true for ALL of the elements in the halogen family? a. They all have more than 10 protons. b. They all have an atomic mass of over 20 amu. c. They all are gases at STP. d. They all have 7 valence electrons. 2. Which of the following increases going down Group 17 on the Periodic Table? a. the number of valence electrons b. the number of electron shells c. the electronegativity d. the first ionization energy 3. Which of the following elements could a halogen bond with to form a stable ionic compound? a. Cu b. Mg c. Cs d. Al 4. Which of the following statements is true about halogens? a. They have low electronegativity values, compared to nonmetals. b. They are all liquids at STP. c. They react only with Group 1 metals. d. They are very reactive nonmetals. 5. How many bonds can an atom of chlorine form? a. 1 b. 2 c. 3 d. 4 6. How many atoms of iodine are needed to react with one atom of magnesium? a. 2 b. 3 c. 4 d. 1 7. Which of the following halogens is the most reactive? a. F b. Br c. Cl d. I 8. Which of the following halogens has the weakest attraction for electrons? a. Cl b. Br c. F d. I 9. Iodine is a solid at STP due to its strong intermolecular forces, relative to mercury. a. True b. False 10. State one property that results from halogens having 7 valence electrons. Ministry of Education Secondary Engagement Program Grade 10 Chemistry Week 4 Lesson 1: Worksheet - Answer Circle the answer that best suites the questions below. 1. Which of the following is true for ALL of the elements in the halogen family? a. They all have more than 10 protons. b. They all have an atomic mass of over 20 amu. c. They all are gases at STP. d. They all have 7 valence electrons. 4. 5. 2. Which of the following increases going down Group 17 on the Periodic Table? a. the number of valence electrons b. the number of electron shells c. the electronegativity d. the first ionization energy 3. Which of the following elements could a halogen bond with to form a stable ionic compound? a. Cu b. Mg c. Cs d. Al Which of the following statements is true about halogens? a. They have low electronegativity values, compared to nonmetals. b. They are all liquids at STP. c. They react only with Group 1 metals. d. They are very reactive nonmetals. How many bonds can an atom of chlorine form? a. 1 b. 2 c. 3 d. 4 6. How many atoms of iodine are needed to react with one atom of magnesium? a. 2 b. 3 c. 4 d. 1 7. Which of the following halogens is the most reactive? a. F b. Br c. Cl d. I 8. Which of the following halogens has the weakest attraction for electrons? a. Cl b. Br c. F d. I 9. Iodine is a solid at STP due to its strong intermolecular forces, relative to mercury. a. True b. False 10. State one property that results from halogens having 7 valence electron. They gain 1 valence electron and form an ion with a charge of -1.
