CHEM 1A03 Lecture Notes - Heat Capacity, Emission Spectrum, Sunscreen

• School: McMaster University
• Department: Chemistry
• Course: CHEM 1A03
• Professor: David Brock

Document Summary

Colours signify state on the periodic table. Only 3 elements liquid at room temp. Carbon: diamonds decompose into graphite (more stable) Oxidation state & oxidation numbers: actual charge of a monatomic ion. Cl- (-1), mg2+ (+2: hypothetical charge of an atom in a molecule or polyatomic ion. Co2 (c = +4, o = -2) Group 1 metals always + 1, group 2 metals always +2. Higher elements take priority in terms of assigning oxidation numbers. O is usually 2, sum of on = overall charge. H is almost always +1 except in metal hydrides. Moving up the period table in group 1 decreases the likelihood of it being +1, moving down the. F is always -1 periodic table in the last group decreases the likelihood of it being -1. If comparing two elements in the same group, give the pos charge to the element that is lower in the periodic table.