C | ||
---|---|---|
1 pt | ||
What is coal? | ||
The major ore of carbon | ||
2 pt | ||
What are diamond, graphite, and fullerene? | ||
Three major allotropes of carbon | ||
3 pt | ||
What is 5730 years? | ||
Half-life of carbon-14 (+/- 10%) | ||
4 pt | ||
What are 1500 K and 7 GPa? | ||
Temperature and pressure needed to convert graphite to a synthetic diamond (+/- 20%) | ||
5 pt | ||
Who are richard Smalley, Robert Curl, and Harold Kroto? | ||
One of the scientists involved in discovering fullerenes and the recipient of the 1996 Nobel Prize | ||
Si | ||
1 pt | ||
What is a semiconductor (computer chips, solar cells, etc.)? | ||
Most common use of elemental silicon | ||
2 pt | ||
What is 26%? (mostly as SiO_2_) | ||
Percentage of silicon found in the Earth's crust (+/- 10%) | ||
3 pt | ||
What are molecular sieves? | ||
Common lab "supply" made of aluminosilicates with many pores | ||
4 pt | ||
What is hith temperature reduction in the presence of carbon? | ||
Typical process used to extract elemental silicon from SiO_2_ | ||
5 pt | ||
What are amethyst, quartz, jasper, and opal? | ||
One of the semi-precious gem(s) based on SiO_2_ | ||
Ge | ||
1 pt | ||
What is it's a metalloid? | ||
Unique characteristic of silicon and germanium compared to the other elements in this group | ||
2 pt | ||
What is a semiconductor for vacuum tube transistors? (W.W. II era) | ||
Initial commercial use of germanium following it's discovery | ||
3 pt | ||
What is it's transparency to infrared light? | ||
Reason why germanium dioxide glass is used for specialized optics | ||
4 pt | ||
What is "eka-silicon"? | ||
Original name of germanium (before it was isolated) | ||
5 pt | ||
What is 0.3%? (Most available germanium is in use and must be recycled/reclaimed) | ||
Percentage of germainum found in it's major source (sphalerite zinc ores) (+/- 10%) | ||
Sn | ||
1 pt | ||
What is bronze? | ||
Alloy made of tin and copper | ||
2 pt | ||
What is it coats the steel can to resist it's corrosion? | ||
Usage of tin in "tin cans" | ||
3 pt | ||
What is white tin (stable) and grey tin (unstable)? | ||
Two major allotropes of tin | ||
4 pt | ||
What is the buttons of their uniform? (these buttons changed from white to grey tin, falling apart and creating a very cold army; this was also a problem in 18-19th century pipe organs) | ||
Reason tin contributed to Napoleon losing his Russian 1812 campaign | ||
5 pt | ||
What is molten glass floats on a molten bed of tin to create very smooth glass? | ||
Usage of tin in the preparation of "float glass" | ||
Pb | ||
1 pt | ||
What is +2? (the remainder are +4) | ||
Oxidation state unique to lead in this group | ||
2 pt | ||
What is PbS? (galena) | ||
Most common lead ore | ||
3 pt | ||
What is lead is a neurotoxin? (caused mental defects in children) | ||
Reason lead paints were banned in the US in the mid-1980s | ||
4 pt | ||
What is an anti-knocking additive in "regular" gasoline? | ||
Major use of tetraethyl lead prior to 1996 | ||
5 pt | ||
What is "lead crystal"? | ||
Product obtained when PbO_2_ is added to glass, increasing it's refractive index | ||
Daily Double | ||
Daily Topic | ||
What is germanium? | ||
Element in this group named after a place | ||