9. Copy and complete the table below, using the periodic table to predict the ratio of atoms for each of the compounds listed:
Name of compound Chemical formula Elements present Ratio of elements present
Lithium chloride
Magnesium sulfide Dihydrogen monoxide Glucose
Carbon monoxide Calcium fluoride
LiCl
MgS H2
O C6
H12 CO
O6 CaF2
10. Use the periodic table to write the chemical formula for each of the following compounds: a. beryllium chloride b. aluminium chloride c. barium bromide d. silicon tetrafluoride e. carbon dioxide f. carbon monoxide
Lithium Chlorine
Li:Cl 1:1
Past paper questions
1. Final Examination 2022, Question 3 An atom of element X is shown in the diagram.
a. Place an X on the periodic table shown below to indicate the position of element X. You may use the periodic table to help you answer this question.