Lewis Symbols (Section)What is the Lewis symbol for each

Chapter 2 Atoms, Ions and Molecules Atoms • Simplest chemical components of an organism are atoms, ions and molecules • Atoms make up matter • Matter comes in three main forms • Solid • Liquid • Gas Atoms • Atoms are composed of protons, neutrons and electrons • Octet rule is needing 8 electrons in the outer most shell • Be able to read and understand a periodic table • Chemical symbol • Atomic number • Average mass • Know what isotypes are • this effects the characteristics of the elements but different number of electrons, also make sure you know Ions • Ions include a positive and negative charged element • Positive charge are called cation • Negative charge is called anion • Electrons are either added or taken away in the process • When ions bond they form “salts” • Ionic compound Covalent • Covalent bonds are formed when electrons are shared • Three types • Single –one pair • Double –two pairs • Triple –three pairs • Isomers are when the same compounds with the same number are arranged differently H-bonding • Hydrogen bonding occurs in polar compounds containing partially positive and partially negative elements • Water bonding with an