alleryStart learning →A sample of a metalloid is heated. What happens to its ability to conduct an electric current?
AIt decreases
BIt increases
CIt stays fixed
DIt falls to zero
Answer & Solution
Correct answer: B. It increases
1. Metalloids have mostly non-metallic properties but sit between metals and non-metals.
2. One of their distinguishing characteristics is that their conductivity increases as their temperature increases.
3. This is the opposite of what happens in metals.
4. The behaviour is called semi-conductance and the materials are called semi-conductors.
5. Silicon and germanium are the usual examples and they matter in digital electronics.
6. Expecting the conductivity to drop applies the metal rule, which is the trap here.
_Source: Siyavula Physical Sciences Grade 10 (Everything Science, CC BY 4.0), Chapter 2: Classification of matter_
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