Chemistry
Grade-9
Easy
Question
A student is given a sample of an unknown substance. He is asked to determine if it is classified as a metal, a metalloid, or a non-metal. He discovered that the unknown element conducted some heat and electricity, had a shiny lustre, and broke easily. This element is most likely a
- Carbon
- Sodium
- Germanium
- Mercury
Hint:
The unknown substance seems to be a metalloid.
The correct answer is: Germanium
- Metals are hard, malleable, lustrous, ductile, conduct electricity.
- Non metals are brittle, cannot conduct electricity, non malleable.
- Metalloids have the property of both metal and non metal. Boron, silicon, germanium, arsenic are metalloids.
- Hence, the unknown substance could be germanium.
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