Forming Compounds
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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.
Forming Compounds
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Presentation Transcript
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.