Lewis Structures Lewis structures?are simplified electron shell diagrams and show pairs of electrons around atoms. A pair of electrons can be represented by dots, crosses, a combination of dots and...
Bond Polarity When two atoms in a covalent bond have the?same electronegativity?the covalent bond is?nonpolar The two chlorine atoms have identical electronegativities so the bonding electrons are ...
Covalent Bonds Covalent?bonding occurs between two?non-metals A covalent bond involves the?electrostatic?attraction?between nuclei of two atoms and the electrons of their outer shells No?electrons?...
Formulae & Names of Ionic Compounds Ionic?compounds?are formed from a?metal?and a?nonmetal?bonded together Ionic compounds are electrically neutral; the positive charges equal the negative char...
Ionic Lattices The ions form a?lattice?structure?which is an evenly distributed?crystalline?structure Ions in a lattice are arranged in a?regular?repeating?pattern?so that positive charges cancel o...
Forming Ions As a general rule,?metals?are on the?left?of the Periodic Table and?non-metals?are on the?right-hand?side Ionic?bonds?involve the?transfer?of electrons from a?metallic?element to a?non...
Halogens The halogens These are the group 17 non-metals that are?poisonous?and include fluorine, chlorine, bromine, iodine and astatine Halogens are?diatomic, meaning they form molecules of?two?ato...
Alkali Metals The group 1 metals The group 1 metals are called the?alkali metals?because they form?alkaline solutions?with high pH values when reacted with water Group 1 metals are lithium, sodium,...
Oxides Oxides across a period The?acid-base?character of the oxides provides evidence of chemical trends in the periodic table The broad trend is that oxides change from?basic?through?amphoteric?to...
