Electronic Technology
What is your device made out of?
MEMBRANE KEYBOARD
What is it?
How does it work?
Gold
Gold is an attractive highly valued metal that has been known for at least 5500 years. It is a pure substance located in period 6, group 11 and known as “Au” in the periodic table of elements. It has a density of 92.282 grams per cubic centimeter and is a solid at room temperature. Gold is the most malleable and ductile element ever known. Pure gold is usually soft, so to increase its strength, it is usually alloyed with other element such as silver or copper. It is a good conductor of heat and electricity and doesn’t tarnish when exposed to air, which is why it is perfect for the use of patterned circuit boards. This transition metal helps circuit boards achieve its purpose by the great conductivity found in it. Also, since its the most malleable and ductile element its easy to make such board the right way.
Carbon
Carbon Ion (+4)
e=2
n=6
Carbon Ion (-4)
e=8
n=6
Lewis Dot
e=6
n=6
Reactivity
Recycling
Whatever you do, don’t throw a keyboard away! Many electronics contain materials that can negatively impact the environment if just tossed away in the garbage. Almost all electronics can be recycled and sometimes re-used. There are plenty of places that will properly dispose anything like keyboards the right way. But before looking for these places there is still a way to re-use them by either donating or selling them instead of just throwing it away. If not, recycling companies will take them and go through a long process. This separates materials and recycles them individually.
Plastic Recycling
Bibliography
http://www.omnicircuitboards.com/blog/bid/337154/Understanding-PCB-Manufacturing-Hard-Gold-Plating
https://en.wikipedia.org/wiki/Keyboard_technology
http://pcbheaven.com/wikipages/How_Key_Matrices_Works/
http://www.lenntech.com/periodic/elements/au.htm
http://www.allgreenrecycling.com/keyboard-recycling/
http://www.daskeyboard.com/blog/recycling-old-keyboards-and-electronic-equipment/