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Chemistry Crosssword

Across
A unit of measure for temperature based upon an absolute scale
Something you can observe without changing matter
A positive subatomic particle
The ability of a substance to dissolve in another
Something you observe
Mixing a substance evenly into another
How much space matter takes up
The state of matter
The amount of product produced during a chemical reaction
The study of matter
Smallest part of matter
A substance that increases the rate of a chemical reaction without changing
Down
A negative subatomic particle
A subatomic particle with no electric charge
A substance with a composition that may vary
Particles that fill their container though have no definite shape or volume
Something used to describe matter
A chemically bonded number of atoms that are electrically neutral
Nothing like it
Material of the definite chemical composition
A substance made with only one kind of atom
The amount of mass per unit volume
The force between atoms
Anything that takes up space
Center of an atom
How much matter in an object