Naming Compounds + Practice

Question 1

When asked to name a compound that consists of a metal and nonmetal (ionic), how do you go about naming them?
Ex: NaCl

Answer 1

• (FIRST STEP: ALWAYS IDENTIFY THE COMPONENTS OF A COMPOUND; METAL, NONMETAL, TRANSITION METAL, POLYATOMIC ION)
• Keep the name of the metal (cation = Na+ = Sodium)
• Change the name of the nonmetal (anion = Cl- = Chlorine = Chloride) and have it end in -ide
• Sodium Chloride

Question 2

Name the following compound

KCl

Answer 2

Potassium Chloride

Question 3

MgO

Answer 3

Magnesium Oxide

Question 4

Li₂S

Answer 4

Lithium Sulfide

Question 5

When asked to write the formula for a compound that consists of a metal and nonmetal (ionic), how do you go about that?
Ex: Sodium iodide

Answer 5

• (FIRST STEP: ALWAYS IDENTIFY THE COMPONENTS OF A COMPOUND; METAL, NONMETAL, TRANSITION METAL, POLYATOMIC ION)
• Write out the charge for each element (Sodium = Na⁺¹; Iodide = I⁺¹)
• Balance the charges, if needed (not needed = NaI)

Question 6

A metal and nonmetal ion together form _______ (ionic/covalent) compounds

Answer 6

ionic

Question 7

A nonmetal and polyatomic ion togetether form ________ (ionic/covalent) compounds

Answer 7

ionic

Question 8

A transition metal and nonmetal ion together form _______ (ionic/covalent) compounds

Answer 8

ionic

Question 9

Write the formula for the following compounds

Magnesium Oxide

Answer 9

MgO

Question 10

Write the formula for the following compounds

Aluminum Chloride

Answer 10

AlCl₃

Question 11

Write the formula for the following compounds

Lithium Sulfate

Answer 11

Li₂SO₄

Question 12

Write the formula for the following compounds

Magnesium Hydroxide

Answer 12

Mg(OH)₂

Question 13

Identify this polyatomic ion

NH₄⁺

Answer 13

ammonium

Question 14

Identify this polyatomic ion

Nitrate

Answer 14

NO₃-

Question 15

Identify this polyatomic ion

Phosphate

Answer 15

PO₄⁻³

Question 16

Identify this polyatomic ion

Carbonate

Answer 16

CO₃⁻²

Question 17

Identify this polyatomic ion

Sulfate

Answer 17

SO₄⁻²

Question 18

Identify this polyatomic ion

Hydroxide

Answer 18

OH⁻

Question 19

Identify this polyatomic ion

Acetate

Answer 19

C₂H₃O₂

Question 20

Identify this polyatomic ion

Cyanide

Answer 20

CN⁻

Question 21

If a polyatomic anion have one less oxygen than the “normal”, it will end in ______
Provide examples.

Answer 21

-ite

NO₂⁻ = nitrite
PO₃³⁻ = phosphite

Question 22

If a polyatomic anion starts with a hydrogen, use the prefix _____

Answer 22

bi- or hydrogen

HCO3- = bicarbonate/hydrogen carbonate
HSO3- = bisulfit/hydrogen sulfite

Question 23

When asked to write the formula for a compound that consists of a transition metal and nonmetal (ionic), how do you go about that?
Ex: Cobalt (III) chloride

Answer 23

• Identify the charges on each; the roman numeral tells you the number of cations for that elements (Cobalt (III) = Co⁺³; Cl⁻¹)
• Balance it out (we need 3 Cl to balance out the charges)
• Write new formula (CoCl₃)

Question 24

Write out the formula

Copper (II) nitrate

Answer 24

Cu(NO₃)₂

Question 25

Iron (I) oxide

Answer 25

Fe₂O

Question 26

When asked to write the name for a compound that consists of a transition metal and nonmetal (ionic), how do you go about that? Ex: CoCl₃

Answer 26

- Identify the transition metal and nonmetal - Identify the charge on the nonmetal (Cl⁻¹) - Find out the total number of anions (-1 x 3Cl = -3) - Balance it out (Theres only 1 cobalt atom, so this means it must have a charge of +3 to balance out the -3 that we found earlier) - Add -ide to the anion - Cobalt (III) Chloride

Question 27

# Write out the name of this compound Cu(NO₃)₂

Answer 27

Copper (II) nitrate

Question 28

# Write out the formula Aluminum Bicarbonate

Answer 28

Al(HCO₃)₃

Question 29

# Write out the name of this compound FeO

Answer 29

Iron (II) Oxide

Question 30

How do ionic and covalent compounds differ?

Answer 30

**Ionic** = the transfer of electrons between metals and nonmetals **Covalent** = the sharing of electrons betwee two nonmetals

Question 31

How do you go about naming compounds between two nonmetals (covalent)? Ex: CH₄

Answer 31

- Use correct prefix depending on the number of atoms (mono, di, tri, etc). The last element will end in -ide - CH₄ = carbon tetrahydride

Question 32

How do you go about writing formulate for compounds with two nonmetals (covalent) Ex: Carbon monoxide

Answer 32

- Use the prefix to determine the number of atoms - Carbon = C - Monoxide = O = **CO**

Question 33

# Write the name of this compound H₂O

Answer 33

Dihydrogen monoxide

Question 34

# Write the name of this compound IF

Answer 34

Iodine monofluoride

Question 35

# Write the formula for this compound Oxygen difluoride

Answer 35

OF₂

Question 36

# Write the formula for this compound Dioxide

Answer 36

O₂

Question 37

Know the prefix to use when naming covalent compounds

Answer 37

1 = mono 2 = di 3 = tri 4 = tetra 5 = penta 6 = hexa 7 = hepta 8 = octa 9 = nona 10 = deca