Chem chp 3.3-3.4 and 4.3

Cation

positive, usually metal or polyatomic ion

Anion

negative, a non metal (or polyatomic ion)

Naming Anions (negatively charged)

change ending of monatomic anions (usually non-metals) to “-ide” and add the word “ion” after

Don’t change the ending of polyatomic anions but memorize those indicated by the study guide

o= oxygen atom → O^2-

oxide ion

N= Nitrogen atom → N^3-

Nitride Ion

NO₃^-

nitrate ion

Naming Cations (Positive ions)

The only polyatomic cation to memorize is NH₄⁺= ammonium ion

Cations with only one charge are just the element name with ion (NA⁺) Sodium Ion

Cations with more than one possible charge are the element name, followed by a roman numeral in parenthesis for the positive charge, and ending in “ion”

mono

1

di

2

tri

3

tetra

4

penta

5

hexa

6

hepta

7

octa

8

nona

9

deca

10