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).
7. 2^43,112,609 â 1. The third largest number on this list, the number of all the plank volumes in the universe, consists of 185 digits. This number here consists of almost 13 million digits. The significance of this number is that it is currently the largest known prime number. It was discovered in August of 2008 by the Great Internet Messene Prime Search (GIMPS). From here on the numbers become much more difficult to render.