III. Practice Exercises:
Exercise 1: Identify to which type of substance the following items belongs. Write ELEMENT, if the
item is a characteristic of an element and write COMPOUND, if the item is a characteristic of a
compound. Write your answer on your answer sheet.
1. contains only one kind of atom
2. can be classified as a metal, non-metal or a metalloid
3. can be found in the Periodic Table of Elements
4. one unit of this substance is called a molecule
5. can be decomposed by a chemical change
6. represented using formula that represents symbols of elements
7. contains different elements in a fixed ratio
8. cannot be broken down into simpler substances by ordinary chemical means
9. are classified into ionic, covalent, intermetallic or complexes
10. can be broken down/ separated into simpler substances by chemical reactions​