CHEMICAL NOMENCLATURE

Question 1

Chemical nomenclature refers to the _____________

Answer 1

Naming system

Question 2

indicate the elements and their proportions in a compound.

Answer 2

CHEMICAL FORMULAS

Question 3

Shows the exact number of atoms of each element in a compound.

Answer 3

MOLECULAR FORMULA

Question 4

The subscript numeral indicates the _____________ of an element present.

Answer 4

number of atoms

Question 5

____________ are structurally different forms of the same element.

Answer 5

ALLOTROPES

Question 6

____________ show how atoms are bonded to one another in a molecule.

Answer 6

STRUCTURAL FORMULA

Question 7

The simplest chemical formulas. Simply tells us which elements are present. This is expressed as the simplest whole-number ratio of their atoms, but not necessarily the actual number of atoms in each molecule.

Answer 7

EMPIRICAL FORMULA

Question 8

__________ is a substance composed of two or more elements combined in a specific ratio and held together by chemical bonds.

Answer 8

COMPOUND

Question 9

Organization that standardizes the nomenclature system for all chemicals and compounds.

Answer 9

INTERNATIONAL UNION OF PURE AND APPLIED CHEMISTRY (IUPAC)

Question 10

____________ are made up of cations (positive ions) and anions (negative ions).

Answer 10

Ionic compounds

Question 11

Cations

Answer 11

Positive ions

Question 12

Anions

Answer 12

Negative ions

Question 13

These are compounds formed from just two elements.

Answer 13

Binary Compounds

Question 14

Usually involves combination of a Metal Cation + Nonmetallic Anion

Answer 14

Binary Compounds

Question 15

Named by changing the ending of the element’s name to –ide

Answer 15

Binary Compounds

Question 16

_____________ are compounds that consist of three elements. Usually involves polyatomic ions.

Answer 16

Ternary compounds

Question 17

The accepted procedure for designating different cations of the same element is to use Roman numerals.

Answer 17

IONIC COMPOUNDS WITH TRANSITION METALS

Question 18

______________________ form when elements share electrons in a covalent bond to form molecules.

Answer 18

Covalent or molecular compounds

Question 19

Molecular compounds are electrically ________.

Answer 19

neutral

Question 20

Covalent compounds are formed when two ________ react with each other.

Answer 20

nonmetals

Question 21

We place the name of the first element in the formula first, and the second element is named by adding the suffix “-ide” to the root of the element name.

Answer 21

Molecular compound

Question 22

• The prefix __________ may be omitted for the first element.

Answer 22

“mono-”

Question 23

B2H6

Answer 23

Diborane

Question 24

PH3

Answer 24

Phosphine

Question 25

CH4

Answer 25

Methane

Question 26

H2O

Answer 26

Water

Question 27

SiH4

Answer 27

Silane

Question 28

H2S

Answer 28

Hydrogen sulfide

Question 29

NH3

Answer 29

Ammonia

Question 30

______ can be described as a substance that yields hydrogen ions (H+) when dissolved in water.

Answer 30

Acid

Question 31

Formulas for acids contain one or more hydrogen atoms as well as an ______ group.

Answer 31

anionic

Question 32

Acids usually end with _________.

Answer 32

“-ic Acid”

Question 33

An oxyacid, oxoacid, or ternary acid is an acid that contains ________.

Answer 33

oxygen

Question 34

Addition of 1 Oxygen From -ic acid

Answer 34

Per…-ic Acid

Question 35

Removal of 1 Oxygen From -ic acid

Answer 35

-ous Acid

Question 36

Removal of 2 Oxygen From -ic acid

Answer 36

Hypo…ous Acid

Question 37

____________ are the anions containing an oxygen atom bonded to another element, with an overall negative charge.

Answer 37

Oxyanions

Question 38

All H+ ions are removed from -ic

Answer 38

-ic becomes -ate

Question 39

All H+ ions are removed from -ous

Answer 39

-ous becomes -ite

Question 40

The oxyanions with fewer oxygen ends in

Answer 40

-ite

Question 41

The oxyanions with more oxygen ends in

Answer 41

-ate

Question 42

________ can be described as a substance that yields hydroxide ions (OH-) when dissolved in water.

Answer 42

Base

Question 43

Bases usually end with ___________

Answer 43

Hydroxide (OH)

Question 44

______________ is a typical weak base.

Answer 44

Ammonia (NH3)

Question 45

Compounds that have a specific number of water molecules attached to them.

Answer 45

HYDRATES