A process that changes, or transformes one set of chemicals into another.

Chemical reactions that absorb ____ will not occur without a source of energy.

The basic unit of matter.

A pure substance that consists entirely of a atom.

The main types of chemical bonds.

The elements or compounds produced by chemical reaction.

The energy is released in the form of.

The three subatomic particles that make up a atom.

Atoms of the same elemetthat differ in the number of neutrons and electrons they contain.

This formed then one or more elecrons are transferred from one atom to another.

The element or product produced by a chemical reaction.

The energy that is needed to get the reaction started.

A positively charged particle.

A particle that has no charge.

This is formed when atoms of elements share electrons.

Chemical reactions involve changes in the ____ that joins atom in compounds.

Enzymes speed up chemical reactions that take place in cells.

A negatively charged particle.

A substance formed by the chemical combination of two or more elements in definite

When an atom steals an electron from another atom.

An important chemical reaction in your bloodstream that enables _____ to be removed from the body.

The reactants of enzyme- catalyzed reactions.

The Greek philosopher who came up with the concept of the atom.

This contains two atoms of hydrogen, for each atom of oxygen, has the chemical formula od H2O.

The smallest unit of compounds.