Forming Compounds Bonding
Compounds • A compound is a substance that is composed of atoms of two or more different elements that are chemically combined. • Most compounds have totally different properties from the elements of which they are composed. • Chemical bonds are the forces that hold the elements together in a compound creating a state of stability.
Ionic Bonding • Ions Travel • Group 1 travels to group 17 • Group 2 travels to group 16 • Metals and non metals attract • All compounds are looking to become stable with 8 valence electrons. • Properties of ionic bonding • Brittleness • High melting points • Good electrical conductivity
Ions • Positive and negative ions attract each other. • An ionic bond is the attractive force between two ions of opposite charge. Ionic Bonds
Compounds Covalent Bonds • A covalent bond is the attraction of two atoms for a shared pair of electrons that holds the atoms together.
Compounds • A molecule is composed of two or more atoms held together by covalent bonds.
Covalent Bonding • Formed when non-metal atoms share valence electrons • 7 + 7 =16 6 + 6 =16 • Use a dot diagram to predict how an atom will share it’s valence electrons.