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_________ in a solid are arranged close together.
In a chemical ________, there are bonds made or broken.
If there is a ________ change, bonds are made or broken.
Goggles are an important piece of ______ equipment.
We use a ______ burner for heating.
The fireworks display demonstrated their great ____________ skills.
Particles _______ with lots of energy in a chemical reaction.
If particles have lots of ______ they will move quickly.
We use the blue _____ on the Bunsen burner for heating.
When we burn something we say it is undergoing __________.
The original chemicals in a reaction.
The new substance formed in a chemical reaction.
A substance made u of one type of atom and displayed on the periodic table.
A new substance made in a chemical reaction which is usually irreversible.