Nitro, Nitroso, Nitrate, and Nitrite Compounds, Organic. Reactive groups are categories of chemicals that typically react in similar ways because they are similar in their chemical structure. Each substance with a chemical datasheet has been assigned to one or more reactive groups, and CAMEO Chemicals uses the reactive group assignments to make its reactivity predictions.
The largest  number that has a commonly-known specific name is a googolplex,  which is a 1 followed by a googol zeros, where googol is 10100 (a 1  followed by 100 zeros).
The beetles are the largest order of organisms on earth, with about 350,000 species so far identified. The most massive species belong to the genera Goliathus, Megasoma, Chalcosoma and Titanus. The longest species is the Hercules beetle, Dynastes hercules, with a maximum overall length of at least 16.7 cm (6.6 in) including the very long pronotal horn.