Activity 6: Complete the table below and answer the questions about chemical compounds and their names.

Here are the answers to Activity 6:

1. Complete the table:

Compound formula	Compound name	Elements in compound
K$_{2}$O	Potassium oxide	Potassium and oxygen
MgS	Magnesium sulfide	Magnesium and sulfur
LiCl	Lithium chloride	Lithium and chlorine
CaSO$_{4}$	Calcium sulfate	Calcium, sulfur and oxygen
Na$_{2}$CO$_{3}$	Sodium carbonate	Sodium, carbon and oxygen
Mg(NO$_{3}$)$_{2}$	Magnesium nitrate	Magnesium, nitrogen and oxygen

2. Ending of the names of the first three compounds:
The endings are:

• Potassium oxide: -ide
• Magnesium sulfide: -ide
• Lithium chloride: -ide

3. Number of types of elements in the first three compounds:
Each of these compounds has 2 types of elements.

• K$_{2}$O: Potassium, Oxygen
• MgS: Magnesium, Sulfur
• LiCl: Lithium, Chlorine

4. Ending of the names of the last three compounds:
The endings are:

• Calcium sulfate: -ate
• Sodium carbonate: -ate
• Magnesium nitrate: -ate

5. Number of types of elements in the last three compounds:
Each of these compounds has 3 types of elements.

• CaSO$_{4}$: Calcium, Sulfur, Oxygen
• Na$_{2}$CO$_{3}$: Sodium, Carbon, Oxygen
• Mg(NO$_{3}$)$_{2}$: Magnesium, Nitrogen, Oxygen

6. Pattern in naming compounds:
Compounds containing two elements typically end in -ide. Compounds containing three elements, where one of them is oxygen, typically end in -ate.