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- 1. Multiple Choice
The smallest unit of matter which can exist independently is called
an atom
a molecule
a compound
an element
- 2. Multiple Choice
The total number of known elements are
118
119
120
108
- 3. Multiple Choice
The chemical symbol for calcium is
Ca
Cl
Cu
Ce
- 4. Multiple Choice
The valency of hydroxide (OH) radical is
1
2
3
4
- 5. Multiple Choice
The number of atoms present in a molecule is called its
atomicity
valency
symbol
compound
- 6. Fill in the Blank
An________ is a substance made of only one kind of atom.
- 7. Fill in the Blank
The properties of a ________ are different from its constituent elements.
- 8. Fill in the Blank
_________is anything that has mass and occupies space.
- 9. Fill in the Blank
The abbreviations used to represent elements are called ___________
- 10. Fill in the Blank
The arrow symbol in a chemical equation indicates the _______ of the chemical reaction.
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