Section 5 Study Guide

Question 1

A mixture is different from a compound because each substance in a mixture __

Answer 1

retains its own properties

Question 2

Each molecule of hydrochloric acid, HCl, contains one atom of hydrogen and __

Answer 2

one atom of chlorine

Question 3

Which substance do the molecules have the strongest attractions to one another?

Answer 3

sugar, a solid

Question 4

Often atoms join so that each atom will have __

Answer 4

an outermost energy level that is full of electrons

Question 5

In a metallic bond, the nucleus of one atom is attracted by a nearby atoms’s __

Answer 5

electrons

Question 6

Solid ionic compounds have very high melting points because they __

Answer 6

contain charged ions that are locked tightly together

Question 7

The name for the compound with the formula CuBr2 would be written as __

Answer 7

copper (II) bromide`

Question 8

Formaldehyde, CH2O, and acetic acid, C2H4O2, have the same empirical formula but different __

Answer 8

molecular formulas

Question 9

The simplest organic compound is ___

Answer 9

methane

Question 10

Polymers are large organic molecules that are made of __

Answer 10

repeating units

Question 11

A protein is a polymer that is made of __

Answer 11

amino acids

Question 12

Unlike a mixture, a compound has a ___ that is always the same

Answer 12

chemical formula

Question 13

Formula units of salt, NaCl, contain equal numbers of __ and __

Answer 13

sodium ions, chloride ions

Question 14

A ___ formula resembles a ball and stick model of a compound except chemical symbols are used to represent the atoms

Answer 14

structural

Question 15

In ionic compounds, the positive charged ions are formed from __ elements

Answer 15

metal

Question 16

A __ bond is formed by the attraction between positively charged metal ions and the electrons around them

Answer 16

metallic

Question 17

A compound consisting of Br- and CD2+ ions would be named

Answer 17

cadmium (II) bromide

Question 18

The simplest formula for a covalent compound is its __ formula

Answer 18

empirical

Question 19

__ are compounds that have repeating subunits

Answer 19

polymers

Question 20

The forces that hold different atoms or ions together are __

Answer 20

chemical bonds

Question 21

Each molecule of table sugar, C12H22011, contains __ atoms of carbon

Answer 21

12

Question 22

Gases take up a lot of space because gas molecules __

Answer 22

are not attracted to one another

Question 23

Covalent bonds are formed between __

Answer 23

nonmetal atoms

Question 24

Copper is a good conductor of electricity because its electrons

Answer 24

can move from atom to atom

Question 25

The name dinitrogen tetroxide tells you that this compound contains _ N atoms and _O atoms

Answer 25

2; 4

Question 26

When copper combines with oxygen to form copper (II) oxide, the charge of the copper ion is __

Answer 26

Cu2+

Question 27

It is possible for different covalent compounds to have the same empirical formula because empirical formulas represent __

Answer 27

a ration of atoms in the compound

Question 28

How many chemical bonds can carbon form with other atoms?

Answer 28

4

Question 29

Alkanes are hydrocarbons that contain __

Answer 29

single covalent bonds only

Question 30

When two atoms bond, the positive __ of one atom attracts the negative __ of another

Answer 30

nucleus; electron

Question 31

When two chlorine atoms bond, they __ a pair of electons

Answer 31

share

Question 32

A __ bond is formed when atoms share __ of electrons

Answer 32

covalent; pairs

Question 33

Because polyatomic ions are made of covalently bonded atoms that have either gained or lost electrons, they behave like simple __

Answer 33

ions

Question 34

A compound consisting of Cr3+ ions and OH- ions would be named __

Answer 34

chromium (III) hydroxide

Question 35

The chemical formula for the ionic compound consisting of oxide ions and nickel (III) ions is __

Answer 35

Ni2O3

Question 36

A compound's __ formula tells you how many atoms of each type are in one molecule

Answer 36

molecular

Question 37

A __ is a polymer made of bonded amino acids

Answer 37

protein