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1 Created by Boundless Which of the following accurately describes the trends in atomic radii on the periodic table? A atomic radii increase across a period and increase down a group B atomic radii decrease across a period and decrease down a group C atomic radii decrease across a period and increase down a group D atomic radii increase across a period and decrease down a group 2 Created by Boundless Rank the following elements in order of increasing atomic radius: Na, B, F, Br A Br < Na < B < F B F < B < Br < Na C F < B < Na < Br D B < F < Na < Br 3 Created by Boundless The collective states of all electrons in an atom having the same principal quantum number (visualized as an orbit in which the electrons move). A actinide B element C orbital D electron shell 4 Created by Boundless Which of the following is expected to have the smallest radius? A Al3 B Ca2+ C P3 D Ne 5 Created by Boundless A neutral element having which of the following electron configurations would have the largest atomic radius? 6 A [Ne] 3s2 3p5 B [He] 2s2 2p5 C [Ne] 3s2 3p3 D [He] 2s2 2p3 Created by Boundless Which of the following statements accurately describes the change in atomic radii that occurs upon ionization to form an anion or cation? A an anion is larger than its neutral counterpart; a cation is smaller than its neutral counterpart B an anion is larger than its neutral counterpart; a cation is larger than its neutral counterpart C an anion is smaller than its neutral counterpart; a cation is smaller than its neutral counterpart D an anion is smaller than its neutral counterpart; a cation is larger than its neutral counterpart 7 Created by Boundless Rank the following ions in terms of increasing ionic radius: Ca2+, F, O2, Na+. A Na+, F , O2 , Ca2+ B O2 , F , Na+, Ca2+ C Ca2+, O2 , F , Na+ D Ca2+, Na+, F , O2 8 Created by Boundless Which of the following statements describes the variation in the physical properties of the elements across a row of the periodic table? A changes in the physical properties are due to the nature of the bonding interactions of the elements B all of these answers C the elemental states tend to go from solid to liquid to gas across a period D 9 physical properties of the elements vary substantially across a period Created by Boundless Explain why the elements within a group on the periodic table display similar physical properties. A They have the same number of protons B They have similar atomic radii C They have the same number of electrons D They have the same valence electron configuration 10 Created by Boundless Which of the following effects can be used to rationalize the increasing ionization energy of atoms lefttoright across a period? 11 A because the atomic radii are increasing across the period there is less electronelectron repulsion B the electrons are held further from the nucleus C this is not true; ionization energy actually decreases across a period D electrons in the same shell do not substantially contribute to shielding each other from the nucleus Created by Boundless Which of the following is the definition of ionization energy? A the energy required to add an electron to an atom or ion B the energy required for an atom or ion to form a bond C the energy required to remove an electron from an atom or ion D the energy required to remove a proton from the nucleus of an atom or ion 12 Created by Boundless Please order the following elements in terms of increasing electron affinity: Cl, Na, O, C. A Cl, O, C, Na B Na, C, Cl, O C Na, C, O, Cl D Na, O, C, Cl 13 Created by Boundless Which of the following is the most accurate definition of the term "electron affinity"? A the amount of energy required for a neutral atom to form a anion B the amount of energy released when an atom forms a bond C the amount of energy released when an electron is lost from a neutral atom to form a cation D the amount of energy released when an electron is added to a neutral atom to form an anion 14 Created by Boundless Sodium (Na) undergoes ionization to provide the corresponding cation (Na+). Which of the following best described the magnetic properties of Na and Na+? A Na is diamagnetic; Na+ is paramagnetic B Na is paramagnetic, Na+ is diamagnetic C Na is diamagnetic; Na+ is diamagnetic D Na is paramagnetic; Na+ is paramagnetic 15 Created by Boundless Which of the following elements has two unpaired electrons when it is a +3 ion? A antimony B cadmium C aluminum D vanadium 16 Created by Boundless Which of the following elements has three unpaired electrons when it is a +2 ion? A cobalt B zirconium C zinc D strontium
