iRespond Question

1. When a chemical bond is broken, energy is iRespond Question Multiple Choice F A.) absorbed, only B.) released, only C.) both absorbed and released D.) neither absorbed nor released E.)

2. iRespond Question Multiple Choice F Given the balanced equation: I + I → I2 Which statement describes the process represented by this equation? A.) A bond is formed as energy is absorbed. B.) A bond is formed and energy is released. C.) A bond is broken as energy is absorbed. D.) A bond is broken and energy is released. E.)

3. Which atom will form an ionic bond with a Br atom? iRespond Question Multiple Choice F Ionic Bond: Metal and a Nonmetal Bromine is a nonmetal A.) N B.) Li C.) O D.) C E.)

4. When ionic bonds are formed, metallic atoms tend to iRespond Question Multiple Choice F A.) lose electrons and become negative ions B.) lose electrons and become positive ions C.) gain electrons and become negative ions D.) gain electrons and become positive ions E.)

5. An oxygen molecule contains a double bond because the two atoms of oxygen share a total of iRespond Question Multiple Choice F A.) 1 electron B.) 2 electrons C.) 3 electrons D.) 4 electrons Each bond is a shared pair E.)

6. The degree of polarity of a chemical bond in a molecule of a compound can be predicted by determining the difference in the iRespond Question Multiple Choice F A.) melting points of the elements in the compound B.) densities of the elements in the compound C.) electronegativities of the bonded atoms in a molecule of the compound D.) atomic masses of the bonded atoms in a molecule of the compound E.)

7. In a nonpolar covalent bond, electrons are iRespond Question Multiple Choice F A.) located in a mobile "sea" shared by many ions B.) transferred from one atom to another C.) shared equally to two atoms D.) shared unequally by two atoms E.)

8. Based on electronegativity values, which type of elements tends to have the greatest attraction for electrons in a bond? iRespond Question Multiple Choice F A.) metals B.) metalloids C.) nonmetals Fluorine most D.) noble gases E.)

9. The ability of carbon to attract electrons is iRespond Question Multiple Choice F A.) greater than that of nitrogen, but less than that of oxygen B.) less than that of nitrogen, but greater than that of oxygen C.) greater than that of nitrogen and oxygen D.) less than that of nitrogen and oxygen Farther from fluorine E.)

10. Which bond is most polar? iRespond Question Multiple Choice F Fluorine is most electronegative A.) H-F B.) H-Cl C.) H-Br D.) H-I E.)

11. Which substance contains nonpolar covalent bonds? iRespond Question Multiple Choice F A.) H2 Diatomic B.) H2O C.) Ca(OH)2 D.) CaO E.)

12. Which pair of characteristics describes the molecule shown in the accompanying illustration? iRespond Question Multiple Choice F A.) symmetrical and polar B.) symmetrical and nonpolar C.) asymmetrical and polar E.) D.) asymmetrical and nonpolar

13. Which electron-dot structure represents a nonpolar molecule? iRespond Question Multiple Choice F E.) Symetric A.) a B.) b C.) c D.) d

14. Which formula represents a polar molecule? iRespond Question Multiple Choice F A.) Cl2 C.) CH4 B.) CO2 D.) NH3 E.)

15. Which characteristic is a property of molecular substances? iRespond Question Multiple Choice F A.) good heat conductivity B.) good electrical conductivity C.) low melting point D.) high melting point E.)

16. Which substance contains metallic bonds? iRespond Question Multiple Choice F A.) Hg(l) B.) H2O(l) C.) NaCl(s) D.) C6H12O6(s) E.)

17. Conductivity in a metal results from the metal atoms having iRespond Question Multiple Choice F A.) high electronegativity B.) high ionization energy C.) highly mobile protons in the nucleus D.) highly mobile electrons in the valence shell E.)

18. Which statement best describes the substance that results when electrons are transferred from a metal to a nonmetal? iRespond Question Multiple Choice F A.) It contains ionic bonds and has a low melting point. B.) It contains ionic bonds and has a high melting point. C.) It contains covalent bonds and has a low melting point. D.) It contains covalent bonds and has a high melting point. E.)

19. In which compound do atoms form bonds by sharing electrons? iRespond Question Multiple Choice F Sharing = Covalent = 2 nonmetals A.) H2O B.) Na2O C.) CaO D.) MgO E.)

20. When a reaction occurs between atoms with ground-state electron configurations of 1s22s1 and 1s22s22p5, the bond formed is mainly iRespond Question Multiple Choice F Boron (metal) + Fluorine (nonmetal) A.) polar covalent B.) nonpolar covalent C.) metallic D.) ionic E.)

21. The bonds in the compound MgSO4 can be described as iRespond Question Multiple Choice F Contains a polyatomic ion. Covalent between the sulfur and oxygen in sulfate and ionic between the magnesium ion and the sulfate ion A.) ionic, only B.) covalent, only C.) both ionic and covalent D.) neither ionic nor covalent E.)

22. Metallic bonding occurs between metal atoms that have iRespond Question Multiple Choice F A.) full valence orbitals and low ionization energies B.) full valence orbitals and high ionization energies C.) vacant valence orbitals and low ionization energies D.) vacant valence orbitals and high ionization energies E.)

23. Which compound contains only covalent bonds? iRespond Question Multiple Choice F A.) NH4Cl Both (Poly) B.) Ba(OH)2 C.) Ca(OH)2 D.) CH3Cl E.)

24. In which compound have electrons been transferred to the oxygen atom? iRespond Question Multiple Choice F Transfer = Ionic = metal + nonmetal A.) CO2 B.) NO2 C.) N2O D.) Na2O E.)

25. Which molecule contains a triple covalent bond? iRespond Question Multiple Choice F A.) H2 B.) N2 C.) O2 D.) Cl2 E.)

26. Which type of substance is soft, has a low melting point, and is a poor conductor of heat and electricity? iRespond Question Multiple Choice F A.) network solid B.) molecular solid C.) metallic solid D.) ionic solid E.)

27. A substance that has a meltiig point of 1074 K ,conducts electricity when dissolved in water, but does not conduct electricity in the solid phase. The substance is most likely iRespond Question Multiple Choice F A.) an ionic solid B.) a network solid C.) a metallic solid D.) a molecular solid E.)

28. What is the total number of electrons shared in the bonds between the two carbon atoms in a molecule of ... ? iRespond Question Multiple Choice F A.) 6 Each bond is a shared pair B.) 2 C.) 3 E.) D.) 8

29. The bond between hydrogen and oxygen in a water molecule is classified as iRespond Question Multiple Choice F A.) ionic and nonpolar B.) ionic and polar C.) covalent and nonpolar D.) covalent and polar Metal + nonmetal = ionic Nonmetal + nonmetal = polar covalent (unless diatomic) E.)

30. Which substance is correctly paired with its type of bonding? iRespond Question Multiple Choice F A.) NaBr, nonpolar covalent Ionic B.) HCl, nonpolar covalent Polar covalent C.) NH3, polar covalent D.) Br2, polar covalent Nonpolar covalent E.)

31. Which type of molecule is CF4? iRespond Question Multiple Choice F A.) polar, with a symmetrical distribution of charge B.) polar, with an asymmetrical distribution of charge C.) nonpolar, with a symmetrical distribution of charge D.) nonpolar, with an asymmetrical distribution of charge E.)

32. Which formula represents a molecular substance? iRespond Question Multiple Choice F Molecular = Covalent = 2 nonmetals A.) CaO B.) CO C.) Li2O D.) Al2O3 E.)

33. What is the formula for the compound formed by calcium ions and chloride ions? Ca+2Cl-1 A.) CaCl B.) Ca2Cl C.) CaCl3 D.) CaCl2

34. What is the formula for zinc fluoride? Zn+2F-1 A.) ZnF B.) ZnF2 C.) Zn2F D.) Zn2F3