CHEM 103 Lecture Notes - Lecture 1: Nonmetal, Atomic Number, Lanthanide
Document Summary
Z= number of protons, on bottom, matches atomic number. Bonds break or new bonds are formed. Phase change: evaporation, freezing compounds and boiling. Chemical reactions include: color, odor, temperature changes, precipitation formation and explosion (combustion) Some particles were reflected back to the source. Can be solids or liquids at room temp. Alkali metals: soft solids, low melting points, reacts violently with water with flammable reactions. Alkaline earth metals: when combined with oxygen they form oxides, when reacted with chlorine they form chloric compounds. Halogens: react with metals to form salts (especially alkali metals), diatomic molecules. Lanthanide and actinides are at the bottom of the periodic table. Ionic compounds have positive and negative ions. Solids at room temperature, with high melting points, and hard crystals. Ionic bonding: description for the force that bonds cations and anions. Crystal lattice bonding: bonding within solid ionic compounds. Organic molecular compounds have carbon and hydrogen with other elements.
