Naming with Polyatomics

Naming with Polyatomics

Multiple Choice

Is the NaF an ionic or a covalent bond?

• ionic

• covalent

Open Ended

Name NaF

Changes to 2nd Name:

Fluorine → Fluoride

Chlorine → Chloride

Bromine → Bromide

Iodine → Iodide

Carbon → Carbide

Nitrogen → Nitride

Oxygen → Oxide

Sulfur → Sulfide

Phosphorus → Phosphide

Hydrogen → Hydride

Multiple Choice

Is ClO₂ ionic or covalent?

• ionic

• covalent

Open Ended

Name ClO₂

1 → mono

2 → di

3 → tri

4 → tetra

5 → penta

6 → hexa

7 → hepta

8 → octa

9 → nona

10 → deca

Naming with Polyatomics

• When polyatomic ions combine with metals or nonmetals they form ionic bonds.  Therefore the naming system used in compounds containing polyatomics is similar to the naming system for ionic compounds.

Naming with polyatomics

Step 1 is to find the polyatomic in the compound you are naming.

Open Ended

What is the polyatomic in Ca₃(PO₄)₂?

Open Ended

What is the polyatomic in Fe(OH)₃?

Open Ended

What is the polyatomic in (NH₄)₂S

Naming with Polyatomics

When a polyatomic is second, name the element and then name the polyatomic.  DO NOT use -ide.

Example:

Ca₃(PO₄)₂: Ca is calcium

PO₄ is phosphate

Calcium Phosphate

Naming with Polyatomics

When a polyatomic is first in a compound, name the polyatomic and then name the element with the ending -ide.

Example: (NH₄)₂S

NH₄ is Ammonium

S is sulfur

S is last so it becomes Sulfide

Ammonium Sulfide