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Vocab Review

Across
When a substance breaks down into more than one product.
Definite shape and definite volume.
A change in which a substance is created.
A particle that has mass but no charge.
Two or more elements combine to form a compound.
A reaction that gives out heat to its surroundings.
No definite volume and no definite shape.
Down
A positively charged particle in an atoms nucleus.
A rapid exothermic chemical reaction with oxygen.
Definite volume but no definite shape
A reaction that absorbs heat from its surroundings.
A change that can alter the form or appearance, but creates no new substance.
A negatively charged particle.
An odorless element, needed for combustion.
The basic particle from which all things are made. The smallest piece of a pure element.
The measure of how much matter is in an object.