Organization
Elements
Properties
100
something that occurs at regular intervals
What is periodic
100
Necessary for substances to burn
What is oxygen
100
most are solid at room temperature
What is metal
200
elements in a vertical column on the periodic table with similar properties
What is a group
200
helps light bulbs last longer
What is argon
200
a halogen and a metal react to form this
What is salt
300
Horizontal row on the periodic table
What is a period
300
Diamond and soot are both forms of this element
What is carbon
300
These are the most reactive metals
What are alkali metals
400
elements to the right of the zigzag line on the periodic table
What are metalloids
400
this element is classified apart from the othe elements
What is hydrogen
400
Are good conductors of thermal energy and are in the middle of the periodic table
What are transition metals
500
Mendeleev grouped elements according to this
What is increasing atomic mass
500
element that makes up 80% of the air we breathe
What is nitrogen
500
metals that have two outer-level electrons
What are alkaline earth metals
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