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Organizing Elements

8th Grade Organizing Elements

What did Dmitri Mendeleev discover in 1869? A set of patterns in the properties of elements.
What is the atomic mass of an element? the average mass of all isotopes in an element
Mendeleeve noticed that patterns appeared when he arranged the elements in what way? In order of increasing atomic mass
Mendeleev's periodic table had ... blank spaces left in it, which repersented elements that had not yet been discovered. 3
What does the word periodic mean? A regular repeated pattern
A chart of the elements showing the repeating pattern of their properties is called the ... Periodic table
A one or two letter representation of an element is called a ... chemical symbol
How can an elements properties be predicted? From the location in the peroidic table
Each horizontal row in the table is called a ... period
Group 15 of the periodic table is the ... family. Nitrogen
Created by: Music1741