01:119:115 Lecture Notes - Lecture 2: Atomic Nucleus, Atomic Number, Unified Atomic Mass Unit
15 Feb 2018
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Document Summary
Chapter 02 - the chemical context of life. Living organisms and the world they live in are subject to the basic laws of physics and chemistry: biology is a multidisciplinary science, drawing on insights from other sciences. Life can be organized into a hierarchy of structural levels: at each successive level, additional emergent properties appear. This change in characteristics when elements combine to form a compound is an example of an emergent property. For example, a daily intake of 0. 15 milligrams of iodine is required for normal activity of the human thyroid gland. 4he): the atomic weight of an atom, a measure of its mass, can be approximated by the mass number, for example, 4he has a mass number of 4 and an estimated atomic weight of 4 daltons. Electron configuration influences the chemical behavior of an atom. If two atoms come close enough that their unshared orbitals overlap, they will share their newly paired electrons.
