8
10
11
12
1 and 2
1 and 3
2 and 3
1 and 4
source of light
a point source of light
an extended source of light
a source of sound
B
C
Be
Sr
Hydrogen
Carbon dioxide
Nitrous oxide
Methane
2%
3%
3.3%
3.5%
Galena
Calcite
Calamine
Bauxite
Ammonium Phosphate
Potassium Nitrate
Ammonium Nitrate
Urea
Carbon monoxide and carbon dioxide
Butane and propane
Carbon dioxide and oxygen
Methane and ethylene
9 parts gold and 16 parts other metals
18 parts gold and 6 parts other metals
82 parts gold and 18 parts other metals
18 parts gold and 82 parts other metals
