Chapter 2: Atomic Structure-Ionic and Covalent Compounds: Writing formulas of Covalent Compounds

II. Binary compounds containing only nonmetal elements.

The element written first is named first and the second element retains the modified binary ending of -ide. In addition a Latin or Greek prefix is associated with the name of each element to indicate the number of atoms of each element in the periodic table. For example,

 

Number

Prefix

Number

Prefix

1

mono

6

hexa

2

di

7

hepta

3

tri

8

octa

4

tetra

9

nona

5

penta

10

deca

Several examples of the names for binary compounds containing only nonmetal atoms include;

 

CO2

carbon dioxide

CO

carbon monoxide

N2O

dinitrogen monoxide

CCl4

carbon tetrachloride

P2O5

diphosphorus pentoxide

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