There are two main types of compounds: ionic and molecular. Molecular compounds can have either polar molecules or non-polar molecules. The particles in each type of compound have different strengths of attraction, which we can use to explain a number of properties, such as boiling point, solubility in water, odour, and state at room temperature.
Particles can be attracted to each other by forces that cause them to clump together and become a solid. Ionic attraction is a strong force so ionic compounds are solids at room temperature. Molecular compounds have strong covalent bonds inside them, but they are attracted to other molecules by weaker intermolecular forces. Non-polar molecules are attracted by the weakest intermolecular forces, so they are often gases at room temperature. Polar molecules are attracted by the positive and negative ends of other polar molecules, so these are often liquids and solids at room temperature. Text reference is p.90-93. The Power point slide show is on the unit 1 page of this site and is called "interparticle bonding lesson".
Homework: p. 74 #6; p.84 #6; p.94 #6; and complete the Hazardous Materials Assignment Anticipation Guide, using the links on the unit 1 page of this website.
Particles can be attracted to each other by forces that cause them to clump together and become a solid. Ionic attraction is a strong force so ionic compounds are solids at room temperature. Molecular compounds have strong covalent bonds inside them, but they are attracted to other molecules by weaker intermolecular forces. Non-polar molecules are attracted by the weakest intermolecular forces, so they are often gases at room temperature. Polar molecules are attracted by the positive and negative ends of other polar molecules, so these are often liquids and solids at room temperature. Text reference is p.90-93. The Power point slide show is on the unit 1 page of this site and is called "interparticle bonding lesson".
Homework: p. 74 #6; p.84 #6; p.94 #6; and complete the Hazardous Materials Assignment Anticipation Guide, using the links on the unit 1 page of this website.
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