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Unit 4: Electrons, Quantum Mechanical model, energy levels, electron configurations 1. What element has the noble gas configuration [Ne]3s23p1? __________________ 2. What element has the electron configuration notation 1s22s22p63s1? ___________ 3. Which of the following is the correct noble-gas notation for the element strontium? a. [Kr]5s1 b. [Xe]5s2 c. [Kr]6s2 d. [Kr]5s2 4. The above orbital notation is used to represent which element? a. Boron b. Sulfur c. Oxygen d. fluorine 5. The above orbital notation is used to represent which element? a. Phosphorus b. Arsenic c. Nitrogen d. Silicon 6. Which of the following is the correct configuration notation for the element titanium (Ti)? a. 1s22s22p63s23p64s23d2 b. 1s22s22p63s23p63d24s2 c. 1s22s22p63s23p64s24d2 d. 1s22s22p63s23p64s21d2 7. Which of the following is the correct electron configuration notation for the element nitrogen, N? a. 1s22s2 b. 1s22s22p6 c. 1s22s22p3 d. 1s22s21p3 8. Which of the following is the correct electron configuration for an aluminum ion? a. 1s22s22p63s23p1 b. 1s22s22p63s23p6 c. 1s22s22p6 d. 1s22s22p63s2 Unit 4: Electrons, Quantum Mechanical model, energy levels, electron configurations 9. Which of the following electron dot notations is correct for the element phosphorus when it is in the ground state? a. I b. II c. V d. III 10. Which of the following electron dot notations is correct for the element oxygen when it is in the ground state? a. I b. II c. III d. V 11. Which of the following elements has the same number of valence electrons as the element sodium? a. Ar b. Cs c. Ca d. Mg 12. Which of the following elements has the same number of valence electrons as the element selenium? a. Fe b. K c. P d. O 13. Which of the following elements will have similar physical and chemical properties as lithium? a. Rubidium b. Carbon c. Nitrogen d. neon 14. Which of the following elements will have similar physical and chemical properties as Iodine? a. Te b. Xe c. F d. Po Unit 4: Electrons, Quantum Mechanical model, energy levels, electron configurations 15. When an electron gets excited and goes up an energy level, it has ____________ energy and when an electron goes down an energy level, it has ____________ energy. a. Absorbed, released b. Released, absorbed c. Ground, excited d. Excited, absorbed 16. When an electron transitions from n = 3 to n = 4, it has ____________. a. Absorbed energy b. Released energy c. Excited state d. Ground state 17. When an electron transitions from n = 6 to n = 2, it has ___________. a. Absorbed energy b. Released energy c. Ultraviolet radiation d. Infrared radiation 18. What color light is produced when an electron transitions from the n = 6 to n = 2 energy level? a. Blue b. Red c. No color d. violet 19. Given the representation of a chlorine atom, which circle might represent an atom of bromine? a. Circle B b. Circle D c. None of these d. Circle C Unit 4: Electrons, Quantum Mechanical model, energy levels, electron configurations 20. Given the representation of a chlorine atom, which circle might represent an atom of sulfur? a. None of these b. Circle B c. Circle D d. Circle C 21. As one moves from left to right ( → ) within a period across the periodic table, the electronegativity of the elements encountered tends to: a. stay the same b. increase c. decrease 22. The elements with the largest atomic radii are found in the: a. lower right-hand corner of the periodic table b. lower left-hand corner of the periodic table c. upper right-hand corner of the periodic table d. upper left-hand corner of the periodic table Unit 4: Electrons, Quantum Mechanical model, energy levels, electron configurations 23. Of the following elements, which one would have the largest radius? a. Cesium (Cs, atomic #55) b. Potassium (K, atomic #19) c. Hydrogen (H, atomic #1) d. Sodium (Na, atomic #11) 24. The energy required to remove an electron from an atom is known as: a. radioactivity b. electron affinity c. ionization energy d. electronegativity 25. Of the following elements, which one would have the largest ionization energy? a. Cesium (Cs, atomic #55) b. Hydrogen (H, atomic #1) c. Sodium (Na, atomic #11) d. Potassium (K, atomic #19)