Chapter 4

Question 1

When two or more atoms combine a _____ id formed

Answer 1

Molecule

Question 2

When two or more elements combine to form a compound, an entirely new substance results. True or false

Answer 2

True

Question 3

Compounds are composed of atoms held together by ______

Answer 3

Chemical bonds

Question 4

Chemical bonds are classified into three types:

Answer 4

Ionic
Covalent
Metallic

Question 5

Ionic bonds occur between

Answer 5

Metals and nonmetals

Question 6

Which chemical bond involve the transfer of electrons from one atom to another

Answer 6

Ionic bonds

Question 7

Covalent bonds occur between

Answer 7

Two or more nonmetals

Question 8

Which type of chemical bond involve the sharing of electrons between two atoms

Answer 8

Covalent bonds

Question 9

Chemical formula indicates ___ present in the compound

Answer 9

The type and number of each element

Question 10

The chemical formula for water is

Answer 10

H2O

Question 11

The chemical formula for carbon dioxide is

Answer 11

CO2

Question 12

The chemical formula for sodium chloride is represented as

Answer 12

NaCl

Question 13

The chemical formula for carbon tetrachloride is represented as

Answer 13

CCl4

Question 14

Chemical formulas can generally be categorized into three different types:

Answer 14

Empirical formula
Molecular formula
Structural formula

Question 15

____ gives the relative number of atoms of each element in a compound.

Answer 15

Empirical formula

Question 16

The simplest whole-number (ratio) representation of the type and number of elements present in a molecule

Answer 16

Empirical formula

Question 17

____ gives the actual number of atoms of each element in a molecule of a compound

Answer 17

Molecular formula

Question 18

Determine the empirical formula for C4H8

Answer 18

CH2

Question 19

Determine the empirical formula for B2H6

Answer 19

BH3

Question 20

____ is a sketch or diagram of how the atoms in the molecule are bonded to each other

Answer 20

Structural formula

Question 21

Which type of chemical formula uses line to represent covalent bonds and shows how atoms in a molecule are connected or bonded to each other

Answer 21

Structural formula

Question 22

Write the empirical formula for the compound represented by the molecular formula C5H12

Question 23

____ communicated the most information. It coveys the type and actual number as well as the arrangement of the atoms in the molecules. It’s a visual picture of the compound

Answer 23

Structural formula

Question 24

___ converts the actual type and number of elemental atoms in the compound. It does not tell you how each of the atoms are bonded to each other

Answer 24

Molecular formula

Question 25

____ communicated the least. it conveys the simplest whole-umber (relative) relationship of atom to atom in the molecule

Answer 25

Empirical formula

Question 26

A ____ represents atoms as balls and chemical bonds as sticks; how the two connect reflects a molecules shape

Answer 26

Ball-and-stick molecular model

Question 27

In a ___, atoms fill the space between each other to more closely represent our best estimates for how a molecule might appear if scaled to visible size

Answer 27

Space-filling molecular model

Question 28

____ Depict the structural formula with its valance electrons as dots # of valance electrons= group #

Answer 28

Lewis electron-dot structures

Question 29

Mainly used to illustrate covalent-bonded molecular compounds but can be used to illustrate simple ionic compounds

Answer 29

Lewis model

Question 30

They can be used to represent the transfer of electrons from a metal atom to a nonmetal atom, resulting in ions that are attached to each other and therefore bond.

Answer 30

Lewis symbols

Question 31

Nonmetal period 2 elements must obey the ____

Answer 31

Octet rule

Question 32

Use the Lewis model to predict the formula for the compound that forms between calcium and chlorine

Question 33

Octet rule allows us to predict the

Answer 33

Formulas of ionic compounds that result And relative strength of the resulting ionic bonds based on Coulombs law

Question 34

Ionic solids are relatively hard compared to most molecular solids. True or false

Answer 34

True

Question 35

Ionic solids are brittle. When struck, they shatter. true or false

Answer 35

True

Question 36

Ionic solids conduct electricity true or false

Answer 36

False. Ionic solids do not conduct electricity

Question 37

Ionic compounds conduct electricity in the liquid state or when dissolved in water. True or false

Answer 37

True

Question 38

The extra energy that is released comes from the formation of a structure in which every cation is surrounded by anions and vice versa.

Answer 38

Crystal lattice