Chemical Formulae
Often we hear that water is H2O.
This is the chemical formula for water molecule. This means that each molecule of
water has two hydrogen atoms combined with one oxygen atom. A chemical formula is
a symbolic representation of one molecule of an element or a compound. It provides
information about the elements present in the molecule and the number of atoms of
each element. Can you guess the types of atoms and number of each of the atoms in
NaCl, which is the chemical formula for cooking salt?
The chemical formula tells us the types of atoms and the number of each type of atom in one molecule of substance
Here are
some examples of chemical formula
Sodium Chloride
Nacl
1 atom of
Sodium and 1 atom of chlorine
Ammonia
NH3
1 atom of
Nitrogen and 3 atoms of Hydrogen
Glucose
C6H12O6
6 carbon
atoms, 12 Hydrogen atoms 6 oxygen atoms
Common
compounds and their chemical formula
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