There are no completely untraceable poisons. There are, however, some chemicals that are more difficult to detect than others, including arsenic, selenium and plants such as deadly nightshade and oleander.Know More
Toxicology tests are not normally sensitive enough to detect the types of poisons listed above. If, however, foul play is suspected in a criminal investigation, then further testing is conducted, and the poisons are most likely to be detected.
Its discreteness and potent nature give arsenic the title of "king of poisons." As it is extremely difficult to detect, it is often used as murder weapon and is featured as a common trope in literary fiction.Learn More
Iron rusts when it comes in contact with oxygen and water. It rusts faster in acid rain and salty water. Both oxygen and water are necessary for rusting, which is an oxidation reaction.Full Answer >
Aluminum reacts with oxygen to form a layer of aluminum oxide on the outside of the metal, according to HowStuffWorks. This thin layer protects the underlying metal from corrosion caused by oxygen, water or other chemicals. Aluminum burns in oxygen with a white flame to form the trioxide aluminum (III) oxide, says WebElements. Chemists write the chemical reaction between aluminum and oxygen as: 4Al+ 3O2 = 2Al2O3.Full Answer >
Boron was discovered in 1808. French chemists Joseph-Louis Gay-Lussac and Louis-Jaques Thénard and English chemist Sir Humphry Davy independently isolated the element, and all three are credited with its discovery.Full Answer >
Noble gases are inert due to their complete electron shells. Their stable atomic structure makes the energy required to add or remove an electron prohibitively high, so the noble gases do not form compounds in natural conditions.Full Answer >