CHEM 110 Lecture Notes - Lecture 1: Atomic Orbital, Relative Atomic Mass, Atomic Number
Document Summary
Coulomb"s law is the relationship that the electrons have to the protons. Electrons have a negative charge of -1. 602 x 10-19 coulmbs (c). An element with a different number of neutrons is known as an isotope. Atomic weight is the average of the masses of all isotopes. Only the electron cloud is modified in chemical reactions. 1 mol= the number of grams in atomic mass. Only the noble gasses exist as individuals (he, ne, ar, kr, xe, rn) Protons and neutron arrangements only change during nuclear reactions. Ions with opposite charges form ionic solids (salts) Allotropes- one of two or more forms of an element in the same phase. Molecular compounds- molecules made of more than one type of atom.
