THE SMALLEST PARTICLE OF AN ELEMENT .

A SUBSTANCE THAT CANNOT BE BROKEN DOWN ONTO ANYTHING SIMPLER

A GROUP OF TIGHTLY BONDED ATOMS THAT ACTS AS A SINGLE PARTICLE

A CHEMICAL COMBINATION OF TWO OR MORE ELEMENTS

A CHANGE IN SIZE SHAPE OR STATE WITHOUT FORMING A NEW SUBSTANCE

A CHANGE IN MATTER THAT PRODUCES WITH DIFFERENT PROPERTIES OF THE OLD

MATTER CANNOT BE MADE OR DESTROYED