BIOL 1141 Study Guide - Final Guide: Fetus, Chromosome, Adult Stem Cell
Document Summary
2. 1 chemical elements: describe how protons, neutrons, and electrons relate to atomic structure. An atom is the smallest part of an element that displays the property of the element. An atom is composed of subatomic properties: protons, neutrons, and electrons. In the central nucleus of an atom: protons: positively charged, 1 amu, neutrons: no charge, 1 amu. In the orbiting clouds around the nucleus (electron shells): electrons: negatively charged, negligible mass, use the periodic table to evaluate relationships between atomic number and mass number. The atomic number is equal to the number of protons in each atom of an element. Isotopes are atoms of the same element that differ in the number of neutrons, therefore, having different atomic masses: determine how electrons are configured around a nucleus and the relationship between electron shells and energy. The bohr model is a useful way to visualize electron location. Electrons revolve around the nucleus in energy shells (energy levels)