chemistry vocabulary Crossword

A type of matter with a fixed composition.
If all the atoms in a substance has the same identity it becomes
A substance in which the atoms of 2 or more elements are combined.
Characteristic of a material you can observe without changing the identity.
A change in size, shape, or state.
Characteristic of a substance that indicates whether it can undergo a chemical change.
The mass of all substances that are present before a chemical change equals the mass of all the substances after the change.
Explanation of how particles in matter behave.
Element composed of one type, the {blank}.
Particles in a atom with no charge.
Particles in a atom with a negative charge.
Number of protons in an atom is equal to a number called {blank}.
This number is the sum of the number of protons and neutrons.
Atoms of the same element that have different numbers of neutrons.
The process of a solid going directly into a vapor.
A formula that shows what elements are in a compound and what it will become.
Force that holds atoms together in a compound.
Force of attraction between opposite charges.
Attraction formed when elements share electrons.
A neutral molecule that forms as a result of electron sharing.
Substances that react.