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Table of Contents Atomic Symbols
Checkpoint 1
Chemical Formula
Covalent 1
Covalent 2
Ionic 1
Ionic 2
Checkpoint 2
Summary



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Learning Zone - Chemical Symbols and Formula

chemical formula Covalent Compounds 1 covalent 2

Table below indicates the number of covalent bonds of some common elements that can form covalent compounds:

Element

Symbol

Number of bonds

Hydrogen

H

1

Carbon

C

4

Oxygen

O

2

Nitrogen

N

3

Chlorine

Cl

1

For example: A methane molecule contains one carbon and four hydrogen atoms. This can be illustrated as follows

methane molecule and chemical symbol

The lines represent chemical bonds and notice that the carbon atom is connected to four hydrogen atoms, whereas each hydrogen atom can only have one bond, which is connected to the carbon atom (see Table above).

Note that the subscript number 4 indicates there are four hydrogen atoms. Atomic symbols without any subscript number on the left means there is only one of the atom.

Chemical formula covalent2

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