Ionic & Covalent Compound Formulas

You must use the criss-cross method to balance ionic AND covalent compound formulas.

Yes N

o

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1. Yes2. No

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You only need to write a Roman Numeral with transition metals, Sn and Pb.

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1. Yes2. No

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Prefixes are used with…

Ionic

compounds

Covalent c

ompounds Both

0% 0%0%

1. Ionic compounds2. Covalent

compounds3. Both

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1) What is the correct formula when Na+ combines with S2-?

NaS2

S2Na

SNa2

Na2S

Na2S2

0% 0% 0%0%0%

1. NaS2

2. S2Na

3. SNa2

4. Na2S

5. Na2S2

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2) What is the correct formula when Ca2+ and N3- combine?

Ca2N3

Ca3N2

Ca2NO3 CaN

25% 25%25%25%

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1. Ca2N3

2. Ca3N2

3. Ca2NO3

4. CaN

3) What is the correct formula when Mg2+ and O2- combine?

Mg2

O2

O2M

g2 M

gO

OM

g !!

Mg2

O M

gO2

0% 0% 0%0%0%0%

1. Mg2O2

2. O2Mg2

3. MgO4. OMg !!5. Mg2O

6. MgO2

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4) What is the correct formula when Pb4+ and O2- combine?

Pb4O2 Pb2O

Pb2O4 PbO2

PbO

0% 0% 0%0%0%

1. Pb4O2

2. Pb2O

3. Pb2O4

4. PbO2

5. PbO

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5) What is the correct formula when Mg2+ and PO4

3- combine?

Mg3

PO2

Mg3

(PO4)2

Mg2

PO3

Mg2

(PO4)3

MgP

O4

0% 0% 0%0%0%

1. Mg3PO2

2. Mg3(PO4)2

3. Mg2PO3

4. Mg2(PO4)3

5. MgPO4

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6) What is the correct formula when Ca2+ and OH- combine?

CaOH2

CaO2H2

Ca2OH

Ca(OH)2

CaOH

0% 0% 0%0%0%

1. CaOH2

2. CaO2H2

3. Ca2OH

4. Ca(OH)2

5. CaOH

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7) What is the correct formula for Silicon Tetrabromide?

Si4Br

SiBr

SiBr5

SiBr7

SiBr4

SiBr6

0% 0% 0%0%0%0%

1. Si4Br

2. SiBr3. SiBr5

4. SiBr7

5. SiBr4

6. SiBr6

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8) What is the correct formula for Dinitrogen Trisulfide?

NS

N3S2

NS3

N2S3

DnTs

0% 0% 0%0%0%

1. NS2. N3S2

3. NS3

4. N2S3

5. DnTs

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9) What is the correct formula for Phosphorus Pentachloride?

PCl5 P5Cl

P5Cl3 PhCl5

PhCl6 P3Cl

0% 0% 0%0%0%0%

1. PCl5

2. P5Cl

3. P5Cl3

4. PhCl5

5. PhCl6

6. P3Cl

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10) The formula CCl7 would have what name?

Monoca

rbon H

ep...

Carbon Chlorid

...

Carbon H

eptach...

Carbon Chlorid

...

0% 0%0%0%

1. Monocarbon Heptachloride

2. Carbon Chloride Seven

3. Carbon Heptachloride

4. Carbon Chloride

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11) The formula SPO4 would have what name?

Sulfu

r Phosp

ha...

Monosu

lfur M

on...

Sulfu

r Monopho...

Sulfu

r Monopho...

0% 0%0%0%

1. Sulfur Phosphate2. Monosulfur

Monophosphate3. Sulfur

Monophosphide4. Sulfur

Monophosphate

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