Mid-Term: Chapters 1 - 12

Question 1

In Boyle’s law if the pressure increases then:

Answer 1

The volume must decrease

Question 2

Composed of two or more nonchemically united substances that are in no definite proportion by mass

Answer 2

Mixture

Question 3

This law states that when two or more elements combine, they always combine in a fixed or definite proportion by mass

Answer 3

Law of definite proportions

Question 4

The majority of the weight of an atom is found in the:

Answer 4

Nucleus

Question 5

This type of particle has a negative charge

Answer 5

Electron

Question 6

The atomic number is equal to the number of

Answer 6

Protons

Question 7

A “p” orbital can contain a maximum of _____ electrons

Answer 7

6

Question 8

Atoms of the same atomic number and different masses are called:

Answer 8

Isotopes

Question 9

Atoms in group VII A have a tendency to:

Answer 9

Gain electrons

Question 10

An equal sharing of electrons is found in _____ bonds

Answer 10

Covalent

Question 11

Oxidation numbers:

Answer 11

• Are positive or negative numbers
• Show whether atoms bond to other atoms by gaining or losing electrons
• Are written at the top right hand corner of the elements symbol

Question 12

Fe is the symbol for:

Answer 12

Iron

Question 13

NH4+ is called the _____ ion

Answer 13

Ammonium

Question 14

Substances written to the left of the arrow in a chemical equation are called:

Answer 14

Reactants

Question 15

Symbols are abbreviations for a chemical change. (T/F)

Answer 15

False

Question 16

The reaction of an acid with a base to form water and a salt is an example of a _____ reaction

Answer 16

Neutralization

Question 17

The spontaneous decay of nuclei is:

Answer 17

Radioactivity

Question 18

This type of radiation travels as a wave

Answer 18

Gamma

Question 19

A positron results from _____ decay

Answer 19

Beta

Question 20

The addition of oxygen to a substance is one definition for:

Answer 20

Oxidation

Question 21

When embalming a radioactive body the amount of time you spend near the body does not matter. (T/F)

Answer 21

False

Question 22

This substance speeds up a chemical reaction yet appears in unchanged form among the products

Answer 22

Catalyst

Question 23

An increase in oxidation number is one definition for:

Answer 23

Oxidation

Question 24

An allotrope is when an element exists in two or more different forms each with its own physical and chemical properties. (T/F)

Answer 24

True

Question 25

Water has a higher boiling point than expected because of its:

Answer 25

Hydrogen bonding

Question 26

Permanent hardness in water cannot be removed by boiling. (T/F)

Answer 26

True

Question 27

Why shouldn't you use hard water when embalming?

Answer 27

Hard water contains calcium ions which cause clotting

Question 28

A solution containing a relatively small amount of solute

Answer 28

Dilute

Question 29

A solution containing all the solute the solvent is able to hold at a certain temperature and pressure

Answer 29

Saturated

Question 30

Formalin is

Answer 30

* 37% formaldehyde by mass | * 40% formaldehyde by volume

Question 31

A red blood cell placed in a hypertonic solution will:

Answer 31

* Shrink | * Crenate

Question 32

Formaldehyde is not pH dependent. (T/F)

Answer 32

False

Question 33

A negative ion is called a/an:

Answer 33

Anion

Question 34

A substance that increases the OH- concentration is a:

Answer 34

Base

Question 35

A substance that donates a pair of electrons is a/an:

Answer 35

Base

Question 36

This substance is a proton acceptor

Answer 36

Base

Question 37

The study of compounds usually containing elements other than carbon, especially minerals found in the earth

Answer 37

Inorganic chemistry

Question 38

Anything that occupies space and possesses mass

Answer 38

Matter

Question 39

The standard unit of measurement used for heat is the:

Answer 39

Calorie

Question 40

Decomposition of a human body is an example of a physical change. (T/F)

Answer 40

False

Question 41

Sublimation is the process where a substance goes from the liquid to the solid state. (T/F)

Answer 41

False

Question 42

Substance that cannot be decomposed by further chemical means

Answer 42

Elements

Question 43

The temperature at which a substance changes from the liquid state to the gaseous state

Answer 43

Boiling point

Question 44

What are the states of matter?

Answer 44

* Solid * Liquid * Gas

Question 45

What physical property is defined as mass/volume?

Answer 45

Density

Question 46

Changes from one state of matter to another is an example of a _____ property

Answer 46

Physical

Question 47

A substance containing only two substances, one of which is oxygen

Answer 47

Oxide

Question 48

If we go from a solid to a gas then heat is:

Answer 48

Absorbed

Question 49

The amount of heat necessary to convert 1 gram of a solid to 1 gram of a liquid at the substance's melting point

Answer 49

Heat of fusion

Question 50

Any reaction that liberates heat is said to be:

Answer 50

Exothermic