What’s in a name?• When two people use different names for

the same thing, misunderstood words are apt to happen. The British and Americans often get confused.

Find the bonnet. Find the boot.

American English

British English

American English

British English

Which is the chemist and which is the pharmacist?

In Ireland and England, the people who Americans call pharmacists are called chemists

American English

British English

Which is plaster and which is a band-aid?

Plaster: American English

Plaster: British English

Kerosene: American English

Paraffin: British English Paraffin:

American English

Nomenclature• A System of Naming Compounds

• Compounds are two or more atoms of different elements bonded together.

• Even though the gases O2, N2, F2, and Cl2 travel in pairs, their names are simply oxygen, nitrogen, fluorine, and chlorine.

METALS vs. Non-METALS

F2 & Cl2 (Fluorine & chlorine gas)

HF(g) Hydrogen Fluoride

HCl(g) Hydrogen Chloride

H2S Dihydrogen Sulfide

HCN – Hydrogen cyanide

NO - NO2- NO3 - N2O

Cl2O dichlorine monoxide

NH3 Ammonia

PCl3 Phosphorus trichloride

mono- 1 hepta- 7 di- 2 octa- 8 tri- 3 nona- 9 tetra- 4 deca- 10 penta- 5 undeca- 11 hexa- 6 dodeca- 12

In order to be effective in using prefixes to name compounds containing two non-metals, these prefixes must be committed to memory:

Example #1-Names to Formulas

Sulfur trioxide

S O1 3

I’m a Binary Compound

2. Write number of atoms

1. Write symbols of elements

Final FormulaIf no prefix, then 1 is

implied and not written

Example #2-Names to Formulas

dichlorine heptaoxide

Cl O2 7

I’m a Binary Compound

2. Write number of atoms

1. Write symbols of elements

Final Formula

Example #3-Names to Formulas

oxygen difluoride

O F1 2

I’m a Binary Compound

2. Write number of atoms

1. Write symbols of elements

Final FormulaIf no prefix, then 1 is

implied and not written

Example #4-Names to Formulas

dinitrogen tetraoxide

N O2 4

I’m a Binary Compound

2. Write number of atoms

1. Write symbols of elements

Final Formula

Example #5-Names to Formulas

phosphorus pentachloride

PCl1 5

I’m a Binary Compound

2. Write number of atoms

1. Write symbols of elements

Final FormulaIf no prefix, then 1 is

implied and not written

Example #6-Names to Formulas

dinitrogen monoxide

N O2 1

I’m a Binary Compound

2. Write number of atoms

1. Write symbols of elements

Final FormulaIf no prefix, then 1 is

implied and not written

Example #7-Names to Formulas

carbon monoxide

C O1 1

I’m a Binary Compound

2. Write number of atoms

1. Write symbols of elements

Final FormulaIf no prefix, then 1 is

implied and not written

Example #8-Names to Formulas

sulfur hexafluoride

S F1 6

I’m a Binary Compound

2. Write number of atoms

1. Write symbols of elements

Final FormulaIf no prefix, then 1 is

implied and not written

Example #10-Names to Formulas

dinitrogen trisulfide

N S2 3

I’m a Binary Compound

2. Write number of atoms

1. Write symbols of elements

Final Formula

Examples #1- Formulas to Names

CCl4

carbon

mono

tetra

I’m a Binary

Compound

2. Write number of atoms

1. Write names of elements

Final Name

chlorineideIf first prefix is mono, it is implied and not written

Examples #2- Formulas to Names

XeF3

xenonmono

tri

I’m a Binary

Compound

2. Write number of atoms

1. Write names of elements

Final Name

fluorineideIf first prefix is mono, it is implied and not written

Examples #4- Formulas to Names

AsI3

arsenic

mono

tri

I’m a Binary

Compound

2. Write number of atoms

1. Write names of elements

Final Name

iodineideIf first prefix is mono, it is implied and not written

Examples #6- Formulas to Names

IF5

iodinemono

penta

I’m a Binary

Compound

2. Write number of atoms

1. Write names of elements

Final Name

fluorineideIf first prefix is mono, it is implied and not written

Examples #8- Formulas to Names

N2S5

nitrogen

di penta

I’m a Binary

Compound

2. Write number of atoms

1. Write names of elements

Final Name

sulfuride

Examples #9- Formulas to Names

SiCl4

silicon

mono

tetra

I’m a Binary

Compound

2. Write number of atoms

1. Write names of elements

Final Name

chlorineideIf first prefix is mono, it is implied and not written

Practice Problem #1ClF3

Choose the correct name for the compound

1. carbon iodine trifluoride

2. chlorine trifluorine

3. chlorine trifluoride

4. chlorine tetrafluoride

5. none of the abovenext

problemPrefixesElement List

Practice Problem #2arsenic pentabromide

Choose the correct formula for the compound

1. AsBr5

2. ArBr5

3. AsBr7

4. As5Br5. none of the above

next problem

PrefixesElement List

Practice Problem #3N2O3

Choose the correct name for the compound

1. nitrogen trioxide

2. dinitride trioxide

3. dinitrogen trioxygen

4. dinitrogen trioxide

5. none of the abovenext

problemPrefixes

Practice Problem #6dichlorine monoxide

Choose the correct formula for the compound

1. ClO

2. Cl2O

3. ClO2

4. Cl2O2

5. none of the above

next problem

Prefixes

Practice Problem #8Tetraphosphorus decaoxide

Choose the correct formula for the compound

1. P4O10

2. P6O10

3. 4PO10

4. P2O5

5. none of the above

next problem

Prefixes

Practice Problem #11NO

Choose the correct name for the compound

1. mononitrogen monoxide

2. nitrogen monoxygen

3. mononitrogen oxide

4. nitride monoxide

5. none of the abovenext

problem

This is nitrogen monoxide

Practice Problem #16silicon tetrabromide

Choose the correct formula for the compound

1. SBr4

2. ScBr4

3. SiB4

4. SiBr6

5. none of the above

next problem

PrefixesElement List

The correct formula is SiBr4

Practice Problem #17S4N4

Choose the correct name for the compound

1 tetrasulfur tetranitride

2. tetrasulfur nitride

3. trisulfur trinitride

4. tetrasulfur tetranitrogen

5. none of the abovenext

problemPrefixes

Practice Problem #19BF3

Choose the correct name for the compound

1. monoboron trifluoride

2. boron trifluorine

3. boron trifluoride

4. bromine trifluoride

5. none of the above

Element List

Practice Problem #20tetraphosphorus decasulfide

Choose the correct formula for the compound

1. P6S9

2. P4S9

3. P4Si10

4. Ph4S10

5. none of the above

next problem

PrefixesElement ListThe correct formula is P4S10

Si

As

Al

Ge

Sb

Po

B

Te

At

HH

dual properties

Element List1 Actinium Ac

2 Aluminum Al

4 Argon Ar

5 Arsenic As

6 Astatine At

7 Barium Ba

9 Beryllium Be

10 Bismuth Bi

12 Boron B

13 Bromine Br

14 Cadmium Cd

15 Calcium Ca

17 Carbon C

18 Cerium Ce

19 Cesium Cs

20 Chlorine Cl

21 Chromium Cr

22 Cobalt Co

23 Copper Cu

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24 Fluorine F

• Francium Fr

24 Gallium Ga

• Germanium Ge

• Gold Au

• Helium He

• Hygrogen H

• Indium In

• Iodine I

• Iridium Ir

• Iron Fe

• Krypton Kr

47 Lanthanum La

48 Lead Pb

49 Lithium Li

50 Magnesium Mg

51 Manganese Mn

52 Mercury Hg

53 Molybddenum Mo

54 Neon Ne

55 Nickel Ni

56 Niobium Nb

57 Nitrogen N

58 Osmium Os

59 Oxygen O

60 Palladium Pd

61 Phosphorus P

62 Platinum Pt

70 Plutonium Pu

71 Polonium Po

72 Potassium K

73 Radium Ra

74 Radon Rn

Prefixes

mono- 1 hepta- 7 di- 2 octa- 8 tri- 3 nona- 9 tetra- 4 deca- 10 penta- 5 undeca- 11 hexa- 6dodeca- 12

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