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Study Guide

Chapter 17 Study Guide

What are Aristotle's 4 "elements"? Air, Fire, Earth, Water
When did Alchemy become a real science? In the 17th and 18th centuries
What are the Diatomic Elements? H2, N2, O2, F2, Cl2, Br2, I2
What did Dmitri Mendeleev do? Arranged the elements into what eventually became the periodic table
What is the repetition of certain properties at regular intervals when elements were placed in order of atomic mass? Periodicity
Who arranged the elements in the table in order of their increasing atomic masses? John Newlands
What are metals? Valence electrons that are not held very strongly and are easily removed
What are non metals? They hold their electrons tightly, so their properties are very different from metals
What are horizontal rows of the periodic table called? Periods or Series
What do the period number tell? How many energy levels the element in that period have in their ground state
What is electron affinity? Deals with the strength of attraction of electrons to unbounded atoms
Covalent bonds Non metal/ non metal- sharing electrons
Ionic bonds Metal/ non metal- giving away and taking electrons
Metallic bonds Metal/ Metal- everyone shares the electrons
Created by: LOVELYnamebro