CHEM 1A03 Lecture Notes - Lecture 4: Alkali Metal, Periodic Trends, Amphoterism

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

Document Summary

Readon we use fluoride in toothpaste is linked to the idea of periodic trends. You can excite their electrons and make cool colours. Were considered inert, some noble gasses react, mostly xe and kr. If atom"s dont have filled subshells, they try to fill them. Halogens electron gaining behaviour, need only one electron to have all filled subshells. Iodine, bromine, chlorine (solid, liquid, gas) ability to oxidize increases as well. When non-metals bond with oxygen, they covalently bond. Non-metal oxides form acidic solution, when they are put in water. Both easily oxidize in water or release electrons which the hydrogen ions in water gains. Alkali metals react more vigorously than alkaline earth metals. As you go down a group, elements become more reactive. If we burn a metal like calcium, it would make solid calcium oxide, which is basic. If we add this calcium oxide to water, it will become calcium oxide.