Unit 3 - Periodic Table
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What is a group in the periodic table
A group is a vertical column of elements that have similar chemical properties since they have the same number of electrons in the outer shell
What is a period in the periodic table
A period is a horizontal line of elements where the atomic numbers increase from left to right
How do we separate metals and non-metals (conductivity)
Metals conduct electricity (free electrons) Non-metals do not conduct electricity (they do if ionic and dissolved in water)
How do we separate metals and non-metals (acid-base character of oxides)
Metal oxides dissolve to form alkalis Non-metal oxides dissolve to form acids
What is the periodic table
An arrangement of elements in order of atomic number