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Groups with Metalloids

Characteristics of Groups 13 - 16 of the periodic table.

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Getting Off the Drawing Board

Can we create a circuit with just a pencil and paper?

Credit: John Muk
Source: http://www.flickr.com/photos/jm999uk/182396960/sizes/m/in/photolist-h7Qgb-h7Qgc-h7Qgd-if6C9-sbhyc-zjyWP-zt7yT-DiQEC-NJrVY-PuZN8-36h3n8-4mgR7A-4x6QvY-4BsUb7-4BFToD-4HZ6KJ-4JbbMt-4S9stR-4S9sKn-4S9sSc-4S9t3n-4SdDtQ-4SdDK9-5cvgPz-5kGJ5S-5wopoe-5SZdoK-5SZds4-5SZdDK-5SZdRV-5T4yVd-5T4z5d-5T4zfS-5T75gK-5V3eST-5V3eV4-5V7C6A-5V7C8S-5YVnBn-63yGxE-64qwqD-6i2pXw-6jbEiu-6jFMVg-6jKZ3w-6jKZ7q-6oSK37-6KYtu6-6T9rRF-6ZL3N4-6ZL3Qx/
License: CC BY-NC 3.0

[Figure1]

Many metalloids are used in semiconductors, which are found many circuits.  You can create your own circuit out of a paper and pencil (which contains graphite).  Graphite is sometimes considered a metalloid because it can exhibit metalloid properties.  In this case, it can carry charge, so the paper circuit that we create will be able to connect a light bulb and energy source and make the light bulb shine!  However, the six undisputed metalloids are boron, silicon, germanium, arsenic, antimony and tellurium.  Silicon has characteristics similar to carbon and is commonly used in integrated circuits for computers.  

Creative Applications

  1. How do you increase the circuit’s resistance?
  2. How do you increase the circuit’s voltage?
  3. How do you know that you have increased the circuit’s voltage?
  4. What is the relationship between the thickness of your graphite lines and the current in the circuit?  What about the lines and the voltage?  What about the lines and the resistance?

Resources:

http://en.wikipedia.org/wiki/Graphite

http://en.wikipedia.org/wiki/Semiconductor

http://www.howstuffworks.com/diode.htm

http://www.youtube.com/watch?v=BwKQ9Idq9FM

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