Chemistry 1027A/B Lecture Notes - Lecture 2: Vaporization, Capsaicin, Methanol

• School: Western University
• Department: Chemistry
• Course: Chemistry 1027A/B
• Professor: Felix Lee

Document Summary

O2 oxygen element (one type of atom), compound (more than one atom), inorganic (no carbon) Molecule (more than one type of atom), compound, inorganic. Na+ - sodium plus ion (electric charge), inorganic. C6h12o6 sugars found in food items: glucose, fructose compound, molecule, organic. Covalent bonding: electrons are shared between two atoms: most common with two non-metals, represented through lewis structures, h2 h:h h-h, cl2 cl:cl cl-cl. Typical number of bonds: hydrogen: 1, nitrogen: 3, carbon: 4, oxygen: 2. O2: oxygen h o h. Ch4: methane h c h. Nh3: methane h n h l. Ch40: methanol h c o h l. For larger molecules, line diagram are used to simplify the carbons and hydrogens: I i: ethanol h c c o h oh. Physical properties can be observed or measured without changing the composition of water: appearance, colour, odour, density, solubility. How much of a substance you can dissolve in something else: ex water.