Download Formula Practice Number 1

Formula Practice Number 1
In the table below, identify each element in the compound and list the number of
times it occurs in the compound. Follow the example if you have any questions.
What’s in It?
Compound
Element 1
H2SO4
1
H2O
2
RbCl
3
Na2O
4
BeF2
5
Fe2O3
6
KOH
7
Na2CO3
8
CaCl2
9
CH4
10
C2H5OH
2 - Hydrogen
Element 2
1- Sulfur
Element 3
4 - Oxygen
List the valance electrons for the elements shown in column 1 and 3, then, write
the most likely chemical formula for a compound made from those elements.
Remember to try and get to 8 and follow the example!
What Does it Make?
Element
Valence #
Element
Valence #
Chemical Formula
H
1
O
6
H2O
1
Li
F
2
K
Cl
3
Cs
O
4
Be
S
5
Mg
O
6
B
I
7
C
H
8
Si
O
9
K
S
10
N
H
Bonding Basics Practice Page
Name __________________________
Follow the steps provided by your teacher to complete each bond.
Ionic Bonds - Draw the Lewis structures for each atom, then show the transfer of electrons and
charge for each ion. Write the chemical formula for each compound.
(1) Mg + Br
(2) Pb + S
(3) Al + Cl
Covalent Bonds - Draw the Lewis structures for each atom, then draw circles to show the
electrons that are shared. Write the chemical formula for each compound.
(1) H + Cl
(2) C + Cl
(3) Si + O
T. Trimpe 2002