Ms. Campbell Ionic Bonding Practice Regents Chemistry

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1 Name Student # Ms. Campbell Ionic Bonding Practice Regents Chemistry 1. Which element reacts with oxygen to form ionic bonds? 1) calcium 2) hydrogen 3) chlorine 4) nitrogen 2. Element X reacts with chlorine to form an ionic compound that has the formula XCl2. To which group on the Periodic Table could element X belong? 1) Group 1 2) Group 2 3) Group 13 4) Group Which element forms an ionic compound when it reacts with lithium? 1) K 2) Fe 3) Kr 4) Br 4. The bonds in BaO are best described as 1) covalent, because valence electrons are shared 2) covalent, because valence electrons are transferred 3) ionic, because valence electrons are shared 4) ionic, because valence electrons are transferred 5. Which substance contains bonds that involved the transfer of electrons from one atom to another? 1) CO2 2) NH3 3) KBr 4) Cl2 6. Which type of bond results when one or more valence electrons are transferred from one atom to another? 1) a hydrogen bond 2) an ionic bond 3) a nonpolar covalent bond 4) a polar covalent bond 7. Which type of bond is found in sodium bromide? 1) covalent 2) hydrogen 3) ionic 4) metallic 8. Compared to a calcium atom, the calcium ion Ca 2+ has 1) more protons 2) fewer protons 3) more electrons 4) fewer electrons 9. What occurs when an atom loses an electron? 1) The atom's radius decreases and the atom becomes a negative ion. 2) The atom's radius decreases and the atom becomes a positive ion. 3) The atom's radius increases and the atom becomes a negative ion. 4) The atom's radius increases and the atom becomes a positive ion. 10. As a chlorine atom becomes a negative ion, the atom 1) gains an electron and its radius increases 2) gains an electron and its radius decreases 3) loses an electron and its radius increases 4) loses an electron and its radius decreases 11. Which sample contains particles in a rigid, fixed, geometric pattern? 1) CO2(aq) 2) HCl(g) 3) H2O( ) 4) KCl(s) 12. Which statement best describes the substance that results when electrons are transferred from a metal to a nonmetal? 1) It contains ionic bonds and has a low melting point. 2) It contains ionic bonds and has a high 3) It contains covalent bonds and has a low 4) It contains covalent bonds and has a high 13. Which ion contains the same total number of electrons as Cl? 1) S 2 2) Br 3) Mg 2+ 4) Na +

2 14. Which atom will form an ionic bond with a Br atom? 1) N 2) Li 3) O 4) C 15. The bond between which two elements is the least ionic in character? 1) H-F 2) H-Cl 3) H-I 4) H-O 16. When a potassium atom reacts with bromine, the potassium atom will 1) lose only 1 electron 2) lose 2 electrons 3) gain only 1 electron 4) gain 2 electrons 17. When ionic bonds are formed, metallic atoms tend to 1) lose electrons and become negative ions 2) lose electrons and become positive ions 3) gain electrons and become negative ions 4) gain electrons and become positive ions 18. When combining with nonmetallic atoms, metallic atoms generally will 1) lose electrons and form negative ions 2) lose electrons and form positive ions 3) gain electrons and form negative ions 4) gain electrons and form positive ions 19. Hydrogen forms a negative ion when it combines with sodium to form NaH. This is primarily because hydrogen 1) loses an electron to sodium 2) has a greater attraction for electrons than sodium has 3) is a larger atom than sodium 4) has a smaller ionization energy than sodium 20. As sodium reacts with fluorine to form the compound NaF, each sodium atom will 1) gain 1 electron 2) gain 2 electrons 3) lose 1 electron 4) lose 2 electrons 21. A sample of a substance has these characteristics: melting point of 984 K hard, brittle solid at room temperature poor conductor of heat and electricity as a solid good conductor of electricity as a liquid on in an aqueous solution This sample is classified as 1) a metallic element 2) a radioactive element 3) a molecular compound 4) an ionic compound 22. Which type of substance can conduct electricity in the liquid phase but not in the solid phase? 1) ionic compound 2) molecular compound 3) metallic element 4) nonmetallic element 23. A solid substance was tested in the laboratory. The test results are listed below. dissolves in water is an electrolyte melts at a high temperature Based on these results, the solid substance could be 1) Cu 2) CuBr2 3) C 4) C6H12O6 24. A substance that does not conduct electricity as a solid but does conduct electricity when melted is most likely classified as 1) an ionic compound 2) a molecular compound 3) a metal 4) a nonmetal

3 25. The data table below represents the properties determined by the analysis of substances A, B, C, and D. Which substance is an ionic compound? 1) A 2) B 3) C 4) D 26. Which type of bonding is characteristic of a substance that has a high melting point and electrical conductivity only in the liquid phase? 1) nonpolar covalent 2) coordinate covalent 3) ionic 4) metallic 27. Which of the following substances is the best conductor of electricity? 1) H2O(g) 2) H2O(s) 3) NaCl(s) 4) NaCl( ) 28. Base your answer to the following question on the information below and on your knowledge of chemistry. The balanced equation below represents a reaction. Draw a Lewis electron-dot diagram of one oxygen atom. 29. Draw the electron-dot (Lewis) structure of calcium chloride.

4 30. Base your answer to the following question on An unknown solid was tested and showed the properties listed below: Properties high melting point soluble in water conductor of electricity when dissolved in water non-conductor of electricity as a solid hard surface a State the type of bonding you would expect of this substance. b Explain why this substance conducts electricity when dissolved in water. c Explain why it is hard.

5 Answer Key Ionic Bonding Practice a) Ionic b) When ionic substances dissolve in water the substance breaks down into ions. Ions, being charged particles, can cause a current to flow. c) Ionic substances attract each other strongly because of their opposite charge 29.

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