Perforating Disorders. Perforating Disorders. Classically, a group of disorders in which there is transepidermal elimination (âperforationâ) of components of the dermis, in particular collagen and/or elastic fibers (Table 79.1).
Nitrogen is a chemical element with symbol N and atomic number 7. It is the lightest pnictogen and at room temperature, it is a transparent, odorless diatomic gas. Nitrogen is a common element in the universe, estimated at about seventh in total abundance in the Milky Way and the Solar System.t is the lightest pnictogen and at room temperature, it is a transparent, odorless diatomic gas. Nitrogen is a common element in the universe, estimated at about seventh in total abundance in the Milky Way and the Solar System.
Is nh3 an element? No, NH3 is not an element. To be an element, a substance must have all the same type of atom. This is a chemical compound, made of two types of elements: Nitrogen and Hydrogenâ¦. In one molecule of this compound there are 4 atoms: 1 Nitrogen atom and three Hydrogen atoms. 2 people found this useful.