CHEM 1010U Study Guide - Francium, Lead, Barium
Document Summary
September 8th/14: element: a fundamental substance that cannot be chemically changed or broken down into anything simpler. 83 of the 90 naturally occurring elements are found in reasonable abundance on earth: others like francium (fr) are more rare there is less than 20 grams on the entire earth at any given time. The second is lower case: english name: Aluminum = al: derive from latin or other languages: The first element to be discovered in several thousand years was arsenic (symbol???) (1250: as new elements were found people began to find similarities, categorize elements based on similar properties. John dobereiners observation in 1829 there were triads that appeared to be similar: calcium, strontium, barium, cl, br, i. Property any characteristic that can be used to describe or identify matter. Intensive properties: values that do not depend on the amount of substance.
