BSCI170 Lecture Notes - Goitre, Chlorine, Heme
Document Summary
Elements can be combined to form compounds: a compound contains two or more different elements in a defined ratio, sodium chloride (nacl) is a compound, molecular oxygen (o2) is not a compound. Iodine in thyroid hormone: goiter: expanded gland. Elements are collections of a specific kind of atom: atoms: the smallest unit of structure containing all of the chemical and physical properties of an element. Simple model of atomic structure: elements identified by the number of protons in the nucleus, atomic number. Atomic interactions: when atoms come together, their nuclei never interact, all interactions between atoms occur between electrons only, while all protons are the same, all electrons are not the same, electrons have variable amounts of energy. Energy: two basic types: potential energy, energy that matter possesses because of its location or structure, stored energy, kinetic energy, energy associated with the relative motion of objects, energy in action.
