How are the particles in a solid spaced out?
Tightly packed often in a pattern.
How are the particles in a liquid spaced out?
Close together with no regular arrangement.
How are the particles in a gas arranged?
Separate in no particular arrangement. Moving randomly.
Can solids be compressed?
No
Can liquids be compressed?
No
Can gasses be compressed?
Yes.
What is an element?
An element only contains one type of atom.
What is a compound?
Has more than one type of atom.
What is an atom?
The smallest particle of an element that can exist.