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Periodic Table Org.

History and organization of the periodic table

QuestionAnswer
In the modern periodic table, elements are organized by... Atomic number
What was special about Mendeleev's periodic table? He left spaces for undiscovered elements
How many periods are there in the modern periodic table? 7
What is a period? A horizontal row
What is a group? A vertical column
Elements in a group have similar.... Reactivity and other properties
Non-metals are found on what part of the periodic table? The upper right
Metals are found on what part of the periodic table? The lower left
Semimetals or metalloids are found where on the periodic table? On the zig zag that goes from upper left to lower right
Group 17 is an element family called... Halogens
How many groups are there on the modern periodic table? 18
What are some properties of metals? Shiny, ductile, malleable, conduct electricity and heat
What are some properties of non-metals? Dull, brittle, do not conduct electricity
What are the elements that have properties of both metals and non-metals called? Metalloids or semi-metals
Name some elements that are in the alkaline metal family Lithium, sodium, potassium, rubidium, cesium
What is the name of the family that contains only inert gases (they are in the last column on the periodic table) Noble gases
Created by: mmetzler