1
Q
Element
A
A pure substance that is made up of only one type of atom
2
Q
Periodic table of elements
A
All known elements in the universe organized according to their properties
3
Q
General categories of elements
A
3
Metals, non-metals, Metalloids
4
Q
Metal’s properties
A
Shiny, metallic appearance Solid at room temp, besides mercury High melting points High densities Malleable Ductile Thermal(heat) conductors Electrical conductors Large atomic radii
5
Q
Non-metal’s properties
A
Poor heat/electrical conductors Brittle if solid Non-ductile No metallic luster Transparent as a thin sheet Can be solid liquid or gas at room temp
6
Q
Metalloid’s properties
A
B, Si, Ge, As, Sb, Te, Po, At Solid Can be shiny or dull May conduct electricity Poor conductors of heat Brittle Non-ductile
7
Q
Chemical symbol
A
A universally recognized notation method of representing an element
8
Q
Rules for elements symbols
A
- A symbol will have either 1 or 2 letters
- The first letter is always capitalized
- If there is a 2nd letter, it’s always lower case
