Grade 12 Chemistry: Exploring Metalloids
This worksheet covers the properties, characteristics, and applications of metalloids at a Grade 12 chemistry level.
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Grade 12 Chemistry: Exploring Metalloids
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Read each question carefully and provide detailed answers based on your knowledge of metalloids. Refer to the periodic table for assistance if needed.
Refer to the image below for a visual representation of metalloids on the periodic table.
1. Which of the following elements is classified as a metalloid?
Sodium (Na)
Silicon (Si)
Oxygen (O)
Iron (Fe)
2. Metalloids are often referred to as semiconductors because:
They conduct electricity very well.
They do not conduct electricity at all.
Their conductivity is between that of conductors and insulators.
They are only used in semi-conductors.
3. Metalloids exhibit properties of both and .
4. Silicon is a common metalloid used extensively in the industry.
5. Describe at least two physical properties that characterize metalloids. Provide examples for each.
6. Explain why the position of metalloids on the periodic table is significant in understanding their chemical behavior.
7. All metalloids are excellent conductors of heat and electricity.
True
False
8. Germanium is a metalloid commonly used in optical fibers.
True
False
Match each metalloid with its primary application.
9. Boron
a. Flame retardants, glass
10. Arsenic
b. Doping agent in semiconductors
11. Antimony
c. Batteries, bullet alloys
12. Discuss the importance of metalloids in modern technology, providing specific examples of their use in various applications. Your answer should cover at least three different metalloids and their respective technological roles.