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Unit 6 Review

Unit 6 Review. Ionic Compounds. 1. What does the term coordination number in ionic crystals refer to?. A. The number of similar charged ions around a particular ion. B. The number of oppositely charged ions around a particular ion. C. The number of cations in a crystal.

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Unit 6 Review

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  1. Unit 6 Review Ionic Compounds

  2. 1. What does the term coordination number in ionic crystals refer to? A. The number of similar charged ions around a particular ion. B. The number of oppositely charged ions around a particular ion. C. The number of cations in a crystal. D. The number of anions in a crystal.

  3. 2. How many electrons does nitrogen gain in order to achieve a noble-gas electron configuration? • 0 • 1 • 2 • 3

  4. 3. How does oxygen obey the octet rule when reacting to form compounds? • It loses electrons. • It gains electrons. • It is already stable. • Oxygen does not form compounds.

  5. 4. What is the electron configuration of the calcium ion? • [Ar]4s2 • [Ar] • [Ne]3s23p6 • [Ar]4s24p6

  6. 5. Ionic compounds are normally in which physical state at room temperature? • Solid • Liquid • Gas • Plasma

  7. 6. What sub-atomic particle is free to drift in metals? • Proton • Neutron • Electron • All of the above

  8. 7. What is the formula of the ion formed when sulfur achieves the noble-gas electron configuration? • [Ar]3s23p6 • [Ar] • [Ne]3s2 • [Ne]3s23p6

  9. 8. What is the charge on the strontium ion? • 1+ • 2+ • 3+ • 1-

  10. 9. A compound held together by ionic bonds is called a(n) ____. • Acid • Molecular compound • Ionic compound • All of the above

  11. 10. Which of the following is a ternary compound? • NaCl • K2O • MgCl2 • RbOH

  12. 11. How many electrons are transferred from calcium to iodine when forming the compound calcium iodide? • 0 • 1 • 2 • 3

  13. 12. Which of the following elements does NOT form an ion with a charge of 1+? • K • Na • F • Rb

  14. 13. What is the name of the compound formed from lithium and bromine? • Lithium bromine • Lithium bromate • Lithium bromite • Lithium bromide

  15. 14. Under what conditions can potassium bromide conduct electricity? • When it is a solid • When it is a liquid • When it is dissolved in water • Both B and C

  16. 15. What is the charge on the cation in the ionic compound sodium sulfide? • 1+ • 2+ • 1- • 2-

  17. 16. What is the maximum charge an anion is likely to have? • 3- • 4- • 6- • 8-

  18. 17. What is the electron configuration of the iodide ion? • [Kr]5s24d105p6 • [Kr]5s25p6 • [Xe]6s2 • [Ar]5s24d105p6

  19. 18. What characteristic of metals makes them good electrical conductors? • They are losers of electrons. • They form cations. • They have free-floating or delocalized electrons. • They are malleable and ductile.

  20. 19. An ionic bond is a bond between ___. • Metal and metal • Nonmetal and nonmetal • Metal and nonmetal • Anion and anion

  21. 20. What is another name for an ionic compound? • A mixture • A salt • A solution • None of the above

  22. 21. Which of the following pairs of elements is most likely to form an ionic compound? • Nitrogen and oxygen • Magnesium and fluorine • Sodium and aluminum • Chlorine and fluorine

  23. 22. What occurs in an ionic bond? • Electrons are shared between atoms. • Electrons are transferred between atoms. • 2 anions are attracted to on another. • 2 metals are bonded together.

  24. 23. What is true about the melting temperature of potassium chloride? • It has a high MP. • It has a low MP. • You can’t melt it. • None of the above.

  25. 24. How many electrons are transferred from nitrogen to potassium in the formation of the compound potassium nitride? • 0 • 1 • 2 • 3

  26. 25. How many valence electrons are in a silicon atom? • 2 • 4 • 6 • 8

  27. 26. What is the net charge of the ionic compound calcium fluoride? • 2+ • 1- • 0 • 1+

  28. 27. How does calcium obey the octet rule when reacting to form compounds? • It gains electrons • It loses electrons • It is stable • It doesn’t form compounds

  29. 28. The octet rule states that, in chemical compounds, atoms tend to have _____. • Full outer energy levels • 8 valence electrons • 0 valence electrons • Both A and B

  30. 29. The mixture of 2 or more elements, one of which is a metal is called a(n) __________. • Compound • Ionic compound • Acid • Alloy

  31. 30. A metal solution containing mercury is known as a(n) _________. • Substitutional alloy • Interstitial alloy • Amalgam • Ionic compound

  32. Answers 1. B 11. C 21. B 2. D 12. C 22. B 3. B 13. D 23. A 4. C 14. D 24. A 5. A 15. A 25. B 6. C 16. A 26. C 7. D 17. A 27. B 8. B 18. C 28. D 9. C 19. C 29. D 10. D 20. B 30. C

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