Chapter 4 Section Reviews Name:
Section 1: Compounds and Molecules
In the space provided, write the letter of the term or phrase that best completes each statement or
best answers each question.
_____ 1. Which of the following is a compound?
a. salt
b. paint
c. soup
d. air
_____ 2. Atoms and ions are held together by
a. nuclear bonds.
c. physical bonds.
b. stick bonds.
d. chemical bonds.
_____ 3. Which of the following models could be used to compare the sizes of
atoms in a molecule?
a. ball-and-stick
c. space-filling
b. structural
d. formula
_____ 4. There are strong bonds between the atoms in a piece of quartz. These
bonds give quartz a
a. low melting point.
c. low molecular mass.
b. high melting point.
d. high molecular mass.
_____ 5. The attraction between molecules tends to be ____________ the
attraction between ions.
a. weaker than
c. equal to
b. stronger than
d. None of the above
_____ 6. Which molecules are most strongly attracted to one another?
a. water molecules
c. oxygen molecules
b. hydrogen molecules
d. nitrogen molecules
_____ 7. Sugar has a lower melting point than salt because sugar is made of
a. atoms.
c. molecules.
b. ions.
d. crystals.
_____ 8. A hydrogen bond between water molecules is which of the following
when compared with the bonds within an individual water molecule?
a. It is stronger.
c. It is the same strength.
b. It is weaker.
d. None of the above
_____ 9. A compound with only two atoms would not have a
a. chemical structure.
c. bond length.
b. chemical bond.
d. bond angle.
_____ 10. Which of the following models would show the bond angle?
a. ball-and-stick
c. space-filling
b. structural
d. formula
Section: Ionic and Covalent Bonding
_____ 11. Atoms sometimes form bonds to
a. lose energy.
b. become more stable.
c. give away neutrons.
d. give away protons.
_____ 12. Copper atoms are held together by ____________ bonds.
a. metallic
c. ionic
b. hydrogen
d. covalent
_____ 13. Sodium has one electron in its outer shell and chlorine has seven
electrons in its outer shell. The atoms will form a(n) ____________
bond by ____________ their electrons.
a. covalent, transferring
c. ionic, transferring
b. covalent, sharing
d. ionic, sharing
_____ 14. Oxygen atoms have six electrons in their outer shells. When two
oxygen atoms bond, they will form a(n) ____________ bond by
____________ their electrons.
a. covalent, transferring
c. ionic, transferring
b. covalent, sharing
d. ionic, sharing
In the space provided, write the letter of the term or phrase that best matches each
description. You may use each letter more than once.
_____ 15. formed by atoms in metals packing
electrons close together
_____ 16. positive and negative ions are formed
a. ionic bond
b. covalent bond
c. metallic bond
_____ 17. usually occurs between nonmetals
_____ 18. allows copper to bend and conduct electricity
_____ 19. creates compounds with very high boiling points
_____ 20. creates compounds with low boiling points
_____ 21. usually occurs between a nonmetal and a metal
Section: Compound Names and Formulas
_____ 22. An ionic compound of calcium and chlorine would be named
a. calcium chlorine.
c. calcium chloride.
b. calcium chlorite.
d. chlorine calcium.
_____ 23. A covalent compound made of one sulfur and two oxygen atoms would be
named
a. sulfur dioxide.
c. disulfur oxide.
b. sulfur oxide.
d. sulfide oxygen.
_____ 24. An ionic compound made of copper (Cu2+) and oxygen would be named
a. copper oxygen.
c. dicopper oxide.
b. copper oxide.
d. copper(II) oxide.
_____ 25. The covalent compound N2O5 would be named
a. nitogen oxide.
c. nitogen pentoxide.
b. dinitrogen oxide.
d. dinitrogen pentoxide.
_____ 26. Because the overall charge in a compound must be ____________, the
charge of iron in Fe2O3 can be calculated as 3+.
a. 2+
c. 1+
b. 0
d. 1–
_____ 27. In the compound TiO2, titanium has a charge of
a. 3+.
c. 4+.
b. 4–.
d. 2+.
_____ 28. The chemical formula for an ionic compound of aluminum and chlorine is
a. AlCl.
c. AlCl3.
b. ClAl.
d. Al3Cl.
_____ 29. The chemical formula for an ionic compound of potassium and oxygen is
a. KO.
c. K2O2.
b. K2O.
d. KO2.
_____ 30. The ____________ formula of a compound is written in the simplest
whole number ratio of atoms.
a. empirical
c. molecular
b. chemical
d. ionic
_____ 31. The formula C6H12O6 would be the ______________ formula for glucose.
a. chemical and empirical
c. empirical and structural
b. molecular and empirical
d. chemical and molecular
Section: Organic and Biochemical Compounds
_____ 32. All organic compounds must contain the element
a. oxygen.
c. nitrogen.
b. hydrogen.
d. carbon.
_____ 33. The atoms in organic molecules are held together by ____________
bonds.
a. hydrogen
c. ionic
b. covalent
d. metallic
_____ 34. The atoms of propane are held together by ____________ bonds.
a. single
c. triple
b. double
d. ionic
_____ 35. A chemical formula with the pattern CnH2n+2 must represent a(n)
a. alkene.
c. alkane.
b. alcohol.
d. polymer.
_____ 36. Ethene differs from ethane in that it has a
a. single bond.
c. triple bond.
b. double bond.
d. quadruple bond.
_____ 37. An alcohol must contain a(n)
a. double bond.
b. –OH group.
c. triple bond.
d. –COOH group.
_____ 38. ____________ is a polymer that contains many different molecules of
amino acids.
a. glucose
c. DNA
b. protein
d. methane
_____ 39. The polymer ____________ determines your genetic makeup.
a. carbohydrate
c. DNA
b. glucose
d. methane
_____ 40. A polymer of sugar molecules is called a(n)
a. carbohydrate.
c. DNA.
b. amino acid.
d. protein.
Draw the Lewis Structure of the Ionic Bond created in the following chemical
reactions, write the chemical formula, and name the compound.
1) Lithium + Oxygen
2) Calcium + Chlorine
3) Magnesium + Nitrogen
Draw the Lewis Structure of the Covalent Bond created in the following chemical
reactions, write the chemical formula, and name the compound.
1) Chlorine + Oxygen
2) Nitrogen + Hydrogen