BIOL 1107 Lecture Notes - Lecture 1: Hydrophile, Molecular Geometry, Chlorophyll
Document Summary
Element is a pure substance that cannot be broken down into simpler substances by ordinary chemical or physical techniques. Matter composed of elements and combos of elements. Nacl split into na and cl by water causes the elements to have new emergent properties, na has one less electron and becomes a cation, cl has one more electron and becomes an anion. Covalent bond allows life to exist, since ionic bonds get dissolved in water, so they can form an actual structure like phospholipid bilayer, body is 80% water. Four elements: carbon, hydrogen, oxygen and nitrogen make up 96% of the weight of living organisms; oxygen is highest. Carbon is key to new variations since it can form 4 covalent bonds. Because of these covalent bonds, formations of new symmetries and shapes are possible, and thus more functions and qualities are derived. 2s orbitals can hold 4 more 2p orbitals, which hold 2 electrons.
