How To Write The Chemical Formula And Chemical Names Of Ionic Compounds printable pdf download

How To Write The Chemical Formula And Chemical Names Of Ionic Compounds

How to write the chemical formula and chemical names of ionic compounds

SNC2D1

Chemical formula:

 is a combination of symbols that represent a particular compound

 shows the combining ratio of atoms

Writing Chemical Formulas:

Example 1: what is the formula for the ionic compound formed by calcium and iodine?

STEP 1: Write the symbols, with the metal first.

STEP 2: Write the ionic charge above each symbol to indicate the stable ion that each

element forms.

STEP 3: Determine how many ions of each type you need so that the total ionic charge is

ZERO.

_____(+2) + ____ (-1) = 0

1 (+2) +

2 (-1) = 0

(+2) + (-2)

= 0

STEP 4: Write the formula using subscripts to indicate the number of ions of each type.

*NOTE: the subscript “1” is unnecessary because the symbol

CaI

itself represents ONE atom/ion

Writing chemical names:

Always remember, the metal keeps its name, and the non-metal needs the ending (suffix) to be

changed to “–ide”.

Using the example above, the chemical name of CaI

is Calcium iodide.

How To Write The Chemical Formula And Chemical Names Of Ionic Compounds