Chemical Formula
1. Write the number of atoms for the molecules and compounds
given below:
N= 1
H=3
a) NH3
b) H2
c) CH4
d) SO3
e) Cl2
f) HCl
g) H2O
h) CH3CH2OH
2. Using the particle diagrams write the atoms for the following
molecules.
H
C O
O C O
H C
OS OH
O OH
Cl
H
a)
b)
c)
d)
3. How many atoms of each element are in the following compounds
e.g. H2O = 2 atoms of hydrogen & 1 atom of oxygen
a) Al2O3
b) KOH
c) CaCO3
d) HNO3