CHEM 1A03 Chapter Notes - Chapter 2-1: Ionic Compound, Chlorate, Chlorine

• School: McMaster University
• Department: Chemistry
• Course: CHEM 1A03
• Professor: Lydia Chen

Document Summary

Unit 2 module 1 fundamental skills review (fsr) Elements are the smallest particle that cannot be chemically broken down into smaller substances. Majority of elements are found as metals with a number of non-metals. Elements along the interface between metals and non-metals have properties of both and are called metalloids. Last column of the periodic table are the noble gases. Vertical columns groups or families (18) Ex: allotropes of carbon include carbon nanotubes, buckeye balls, diamond and graphite. We can use elements to excite electrons (ex: neon signs) Elements have a range of behaviours (some reactive, some non-reactive) Some elements are lighter than air (ex: helium) An ion is monatomic when it has a single charged atom the charge it possesses is known as its oxidation state. Sum of oxidation numbers for a molecule must always be zero. Sum of oxidation numbers for a polyatomic ion must add to the charge on the ion.