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Name: ____________________________________ 1. 4. Which element is a metalloid? What can be concluded if an ion of an element is smaller than an atom of the same element? 1. Al 3. As 2. Ar 4. Au -------------- 2. An atom of an element has a total of 12 electrons. An ion of the same element has a total of 10 electrons. Which statement describes the charge and radius of the ion? 1. The ion is negatively charged because it has fewer electrons than the atom. 2. The ion is negatively charged because it has more electrons than the atom. 3. The ion is positively charged because it has fewer electrons than the atom. 4. The ion is positively charged because it has more electrons than the atom. -------------1. The ion is positively charged and its radius is smaller than the radius of the atom. 2. The ion is positively charged and its radius 5. is larger than the radius of the atom. Which two characteristics are associated with 3. The ion is negatively charged and its radius metals? is smaller than the radius of the atom. 4. The ion is negatively charged and its radius 1. low first ionization energy and low is larger than the radius of the atom. electronegativity 2. low first ionization energy and high electronegativity 3. 3. high first ionization energy and low Which element has the greatest density at STP? electronegativity 1. barium 3. magnesium 4. high first ionization energy and high 2. beryllium 4. radium electronegativity -------------- 6. 9. When an atom loses one or more electrons, this atom Which changes occur as a cadmium atom, Cd, becomes a becomes a cadmium ion, Cd2+? 1. positive ion with a radius smaller than the radius of this atom 2. positive ion with a radius larger than the radius of this atom 3. negative ion with a radius smaller than the radius of this atom 4. negative ion with a radius larger than the radius of this atom 1. The Cd atom gains two electrons and its radius decreases. 2. The Cd atom gains two electrons and its radius increases. 3. The Cd atom loses two electrons and its radius decreases. 4. The Cd atom loses two electrons and its radius increases. 10. 7. Which element has atoms with the greatest attraction for electrons in a chemical bond? Which grouping of circles, when considered in order from the top to the bottom, best represents the relative 1. beryllium size of the atoms of Li, Na, K, and Rb, respectively? 2. fluorine 3. lithium 4. oxygen 11. Which trends are observed as each of the elements within Group 15 on the Periodic Table is considered in order from top to bottom? 1. 2. 3. 4. 8. At STP, which element is brittle and not a conductor of electricity? 1. S 3. Na 2. K 4. Ar 1. Their metallic properties decrease and their atomic radii decrease. 2. Their metallic properties decrease and their atomic radii increase. 3. Their metallic properties increase and their atomic radii decrease. 4. Their metallic properties increase and their atomic radii increase. -------------- 12. 2- What is the total number of electrons in a S ion? 17. 1. 10 3. 16 Which pair of symbols represents a metalloid and a 2. 14 4. 18 noble gas? 13. The elements in Period 5 on the Periodic Table are arranged from left to right in order of 1. 2. 3. 4. decreasing atomic mass decreasing atomic number increasing atomic mass increasing atomic number 1. Si and Bi 3. Ge and Te 2. As and Ar 4. Ne and Xe -------------- 18. Which change occurs when a barium atom loses two electrons? 1. It becomes a negative ion and its radius decreases. 2. It becomes a negative ion and its radius increases. 3. It becomes a positive ion and its radius decreases. 4. It becomes a positive ion and its radius increases. 14. As a chlorine atom becomes a negative ion, the atom 1. 2. 3. 4. gains an electron and its radius increases gains an electron and its radius decreases loses an electron and its radius increases loses an electron and its radius decreases -------------19. Which of these elements has the least attraction for electrons in a chemical bond? 15. Based on Reference Table S, the atoms of which of these elements have the strongest attraction for 1. oxygen electrons in a chemical bond? 2. fluorine 3. nitrogen 4. chlorine -------------- 1. N 3. P 2. Na 4. Pt -------------- 20. As the elements of Group 1 on the Periodic Table are considered in order of increasing atomic radius, The data table below shows elements Xx, Yy, and the ionization energy of each successive element generally Zz from the same group on the Periodic Table. 16. 1. decreases 2. increases 3. remains the same -------------- What is the most likely atomic radius of element Yy? 1. 103 pm 3. 166 pm 2. 127 pm 4. 185 pm Answer Key for Chapter 6 1. 3 8. 1 15. 1 2. 1 9. 3 16. 3 3. 4 10. 2 17. 2 4. 3 11. 4 18. 3 5. 1 12. 4 19. 3 6. 1 13. 4 20. 1 7. 1 14. 1