Consumer good. Consumer good, in economics, any tangible commodity produced and subsequently purchased to satisfy the current wants and perceived needs of the buyer. Consumer goods are divided into three categories: durable goods, nondurable goods, and services.
Helium is a chemical element with symbol He and atomic number 2. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas that heads the noble gas group in the periodic table. Its boiling and melting points are the lowest among all the elements. Helium is the second lightest element and is the second most abundant element in the observable universe, being present at about 24% of the total elemental mass, which is more than 12 times the mass of all the heavier elements combined.
Chemical Properties. Oxygen is a highly reactive element, highly paramagnetic, and is easily capable of combining with other elements. One of oxygen's most important chemical properties is that it supports combustion (see picture to the right).Oxygen also combines with elements at room temperature, for example, the formation of rust.Decaying is an example of oxygen reacting with compounds.Carbon dioxide and water are the main products of decay.ne of oxygen's most important chemical properties is that it supports combustion (see picture to the right). Oxygen also combines with elements at room temperature, for example, the formation of rust.