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Bonding Test Review

1. What occurs as two atoms of fluorine combine to 8. Which element has an atom with the greatest tendency to become a of fluorine? attract electrons in a chemical bond? A) A bond is formed as energy is absorbed. A) B) chlorine B) A bond is formed as energy is released. C) silicon D) C) A bond is broken as energy is absorbed. 9. Which term indicates how strongly an atom attracts the D) A bond is broken as energy is released. electrons in a chemical bond? 2. To break a chemical bond, energy must be A) alkalinity B) atomic mass A) absorbed B) destroyed C) D) activation energy C) produced D) released 10. Given the electron dot diagram: 3. As two chlorine atoms combine to form a molecule, energy is The electrons in the bond between hydrogen and A) absorbed B) released fluorine are more strongly attracted to the atom of C) created D) destroyed A) hydrogen, which has the higher electronegativity 4. As energy is released during the formation of a bond, the B) fluorine, which has the higher electronegativity stability of the chemical system generally will C) hydrogen, which has the lower electronegativity A) decrease B) increase D) fluorine, which has the lower electronegativity C) remain the same 11. Which formula represents a substance with the greatest 5. Given the formula for hydrazine: degree of ionic bonding? A) PBr3 B) MgBr2 C) NH3 D) CO 12. An is formed when there is a reaction How many pairs of electrons are shared between the two between the elements atoms? A) strontium and chlorine A) 1 B) 2 C) 3 D) 4 B) hydrogen and chlorine C) nitrogen and 6. Given the Lewis electron-dot diagram: D) sulfur and oxygen 13. Which type of bond is formed when electrons are transferred from one atom to another? Which electrons are represented by all of the dots? A) covalent B) ionic A) the carbon valence electrons, only C) hydrogen D) metallic B) the hydrogen valence electrons, only 14. Which sample contains particles in a rigid, fixed, C) the carbon and hydrogen valence electrons geometric pattern? D) all of the carbon and hydrogen electrons A) CO2(aq) B) HCl(g) 7. Which is the correct electron-dot formula for a molecule C) H2O( ) D) KCl(s) of chlorine? 15. Which compound contains both ionic and covalent A) B) bonds?

A) CaCO3 B) PCl3 C) MgF2 D) CH2O C) D) Bonding Test Review

16. Which of the following has the highest melting 23. A substance is an excellent conductor of point? electricity. The chemical bonds in this substance are most likely A) H2O(s) B) Na2O(s) C) SO2(s) D) CO2(s) A) ionic, because the valence electrons are shared between atoms 17. What is the total number of electron pairs shared B) ionic, because the valence electrons are mobile between the two atoms in an O2 molecule? C) metallic, because the valence electrons are A) 1 B) 2 C) 6 D) 4 stationary 18. A molecular compound is formed when a chemical D) metallic, because the valence electrons are reaction occurs between atoms of mobile A) chlorine and sodium 24. Which substance contains metallic bonds?

B) chlorine and yttrium A) Hg( ) B) H2O( ) C) oxygen and hydrogen C) NaCl(s) D) C6H12O6(s) D) oxygen and magnesium 25. Silicon dioxide (SiO2) and are best described 19. Which characteristic is a property of molecular as substances? A) molecular substances with coordinate covalent A) good heat conductivity bonding B) good electrical conductivity B) molecular substances with ionic bonding C) low C) network solids with covalent bonding D) high melting point D) network solids with ionic bonding 20. Which type of substance is soft, has a low melting 26. Which molecule has a nonpolar ? point, and is a poor conductor of heat and electricity? A) B) A) network solid B) molecular solid C) metallic solid D) ionic solid C) D) 21. Magnesium nitrate contains chemical bonds that are 27. Which compound has hydrogen bonding between its A) covalent, only ? B) ionic, only A) CH4 B) CaH2 C) KH D) NH3 C) both covalent and ionic D) neither covalent nor ionic 28. Which formula represents a nonpolar molecule? 22. Base your answer to the following question on Which A) CH4 B) HCl C) H2O D) NH3

statement correctly describes the bonds in the electron 29. Which statement explains why a molecule of CH4 is dot formula shown to the right? nonpolar?

A) The bonds between the atoms in a CH4 molecule are polar. B) The bonds between the atoms in a CH4 molecule are ionic. A) One of the bonds represented is ionic C) The geometric shape of a CH4 molecule B) All of the bonds represented are ionic distributes the charges symmetrically. C) One of the bonds represented is coordinate D) The geometric shape of a CH4 molecule covalent distributes the charges asymmetrically. D) All of the bonds represented are coordinate covalent Bonding Test Review

30. Hydrogen bonding is a type of 33. When calcium chloride is dissolved in , to which end of the adjacent water molecules will a calcium ion A) strong covalent bond be attracted? B) weak ionic bond C) strong A) the oxygen end, which is the negative pole D) weak intermolecular force B) the oxygen end, which is the positive pole C) the hydrogen end, which is the negative pole 31. Which type of attraction results from the formation of weak momentary ? D) the hydrogen end, which is the positive pole 34. Which diagram best illustrates the ion-molecule A) ionic attractions that occur when the ions of NaCl(s) are B) metallic added to water? C) molecule-ion D) van der Waals forces A) 32. The table below shows the normal boiling point of four compounds. B)

C)

D)

Which compound has the strongest intermolecular forces?

A) HF( ) B) CH3Cl( ) C) CH3F( ) D) HCl( ) Answer Key Bonding Test Review

1. B 2. A 3. B 4. B 5. A 6. C 7. D 8. B 9. C 10. B 11. A 12. A 13. B 14. D 15. A 16. B 17. B 18. C 19. C 20. B 21. C 22. C 23. D 24. A 25. C 26. A 27. D 28. A 29. C 30. C 31. D 32. A 33. A 34. A