Chemistry Nomenclature (slide 3)

Question 1

What is “nomenclature”?

Answer 1

A system for naming or classifying compounds

Question 2

Why is nomenclature important?

Answer 2

Identifies the reactants involved in the products

Question 3

Monovalent Cation Compounds
Cation:
Anion:
Ex:

Answer 3

Ionic compounds are when metals (cations) and non-metals (anions) react
together

Cation:

Keeps it’s name

Anion:

Changes it’s ending to -ide
Ex: sodium + chlorine 🡪 sodium chloride

Question 4

Multivalent Cation Compounds
Cation:
Anion:
USE:
Ex:

Answer 4

Some cations have multiple charges (valence numbers)

Cation

Keeps it’s name

Use Roman numerals to identify the charge being used

Anion

Changes it’s ending to -ide
Cu+2 + Cl- 🡪 CuCl2 – copper (II) chloride

Question 5

Roman Numerals

Answer 5

one – I

two – II

three – III

four – IV

five – V

six – VI

seven – VII

eight – VIII

nine – IX

ten – X

Question 6

Polyatomic Compounds
Ex.

Answer 6

Polyatomic compounds are when polyatomic ions react with another ion

The polyatomic ion always keeps its name
2 Na+ + CO32- 🡪 Na2CO3

Question 7

Polyatomic Ions
ate and ite

Answer 7

Many polyatomic ions form multiple oxyanions

The suffix changes depending on the form the polyatomic oxyanion takes

The oxyanion with more oxygen takes the suffix –ate

The oxyanion with less oxygen takes the suffix –ite
NO2- – nitrite

NO3- – nitrate

Question 8

Polyatomic Ions cationa and anion

Answer 8

Cation

NH4+ - ammonium

Anion

OH- - hydroxide

Question 9

Application:
Polyatomic Ions

Polyatomic compounds are found in many things

We find many polyatomic compounds in

Answer 9

hot dogs
-Carcinogenic

Question 10

Binary Molecular Compounds
Prefix
Suffix

Answer 10

Prefix

First element: only if more than one (1) atom

Second element: always add prefix

Suffix

First element: keeps its name

Question 11

chemical names?
CO
CO2
CCl4
S3N2
N2O4

Answer 11

– carbon monoxide
– carbon dioxide
– carbon tetrachloride
– trisulfur dinitride
– dinitrogen tetroxide

Question 12

Gases

Gases follow the following rules of nomenclature:

Answer 12

The element keeps its name

Add “gas” after its name

Noble gases

Diatomic molecules (gases)

Question 13

Diatomic Molecules

Answer 13

These elements react with another atom of the same element
to form gases

Share electrons therefore are stable

HOFBrINCl the Twins

Question 14

Name the diatomic Molecules

Answer 14

H2 – hydrogen gas

O2 – oxygen gas

F2 – fluorine gas

Br2 – bromine gas

I2 – iodine gas

N2 – nitrogen gas

Cl2 – chlorine gas

have no fear of ice cold beer