Chapter 6 The Structure Of Matter Test

1.

1 point

_____________ formula: the composition of a compound in terms of the relative numbers and kinds of atoms in the simplest ratio.

chemical

empirical

scientific

molecular

2.

1 point

What prefix means "ten"?

hepta-

nona-

deca-

tetra-

3.

1 point

Bonds can bend, stretch, and rotate without breaking.

True

False

4.

1 point

A covalent bond between two oxygen atoms forms a __________ covalent bond.

triple

single

double

5.

1 point

Which of the following is not a base in DNA?

Thymine

Guanine

Yuangine

Cytosine

6.

1 point

How do you know if a certain compound is an organic compound?

If its empirical formula is the same as its molecular formula.

If it is a fruit or vegetable.

If it has a suffix of -ane.

If it is covalently bonded and contains carbon.

7.

1 point

What is the charge for the oxygen atom in Na2O?

-2

1

There is no charge.

2

8.

1 point

What is the difference between empirical formulas and molecular formulas?

Empirical formulas show only a ratio of atoms while a molecular formula tells you how many atoms are in one molecule of a compound.

Molecular formulas show only a ratio of atoms while an empirical formula tells you how many atoms are in one molecule of a compound.

There is no difference since empirical formula and molecular formula have the exact same meanings.

None of the above.

9.

1 point

Which of the following is NOT a biochemical compound?

Alcohol

Proteins

Carbohydrates

DNA

10.

1 point

Atoms join to form bonds so that each atom has a stable electron configuration.

True

False

11.

1 point

Bonds in which electrons are shared equally are called ______________ covalent bonds.

12.

1 point

Covalent bonds are NOT

featured in polyatomic ions.

usually the result of a compound made of molecules.

between a nonmetal and a nonmetal.

the result of a compound with high melting and boiling points.

13.

1 point

Which of the following descriptions BEST describes metallic bonds? Hint: Look for the detail that applies only to metallic bonds.

Metallic bonds often occur between metals and nonmetals.

Electrons are free to move from atom to atom.

Electrons are immobile and tend to stay where they are.

Electrons are shared between different atoms of different elements.

14.

1 point

Which compound has a network structure that does NOT feature ions?

Sugar

Quartz

Table Salt

15.

1 point

Which compound has a stronger attraction?

Sugar

Dihydrogen sulfide

Water

16.

1 point

What is the name of the compound Fe2O3?

iron(II) oxide

iron(III) oxide

iron(IV) oxide

fermium(II) oxide

17.

1 point

Ethane has 6 hydrogen atoms. How many carbon atoms does Ethane have?

2

12

6

3

18.

1 point

Which model looks a lot like the ball-and-stick model?

Space-filling model

Structural formula

Chemical structure

None of the above

19.

1 point

The compound sodium chloride must have been formed by which bond?

Ionic bond

Covalent bond

Metallic bond

None of the above

20.

1 point

In what way do alcohol and water molecules behave similarly?

Like water molecules, neighboring alcohol molecules are attracted to one another.

One of their molecules gets replaced by a hydroxyl group.

They are completely different in behavior.

None of the above.

21.

1 point

__________ is the simplest alkane and hydrocarbon.

22.

1 point

What is the chemical formula for the ionic compound calcium fluoride?

CaF

CaF2

Ca2F2

Ca2F