Properties of Compounds Chemistry 11 Ms. McGrath

Properties of Ionic compounds Property state at room temperature crystalline solid melting point high electrical conductivity as a liquid yes solubility in water most have high solubility conducts electricity when dissolved in water

Properties of Molecular compounds Property state at room temperature gas, liquid, solid melting point low electrical conductivity as a liquid no solubility in water most have low solubility conducts electricity when dissolved in water not usually

Ionic and Molecular Compounds Ionic compounds contain metals and non-metals. Molecular compounds contain only non-metals. The bonds between metals and non-metals differ from the bonds between two or more non-metals. It is the difference between these types of bonds that give compounds their diverse physical properties.

Valence Electrons Electrons found in the outer most energy level or shell These are the electrons that participate in bonding

Lewis Structures Shows only valence electrons Valence electrons are represented by dots The chemical symbol represents the nucleus (with neutrons and protons) and all the full valence shells

Lewis Structures Electrons fill up one energy level before moving into the higher energy levels Energy levels 1st energy level – maximum 2 electrons 2nd energy level – maximum 8 electrons 3rd energy level – maximum 8 electrons

Lewis Structures

Lewis Structures Complete #2 – 4, page 164