Anything that takes up space, and has mass

Single, positively charged particles inside the nucleus of an atom.

Negatively charged particle that revolves around the nucleus of an atom

substances composed of two or more components that are physically intermixed

A bond that consists of the sharing of electron pairs between atoms

A molecule that can donate a proton or accept an electron pair in reactions.

The smallest complete units of an element that have the elements properties, varying in size, weight and interact with each other.

Uncharged, "neutral" particles in the nucleus of an atom.

The positively charged center core of an atom, consisting of protons and neutrons, and connately nearly all the mass.

Molecules made up of different bonded atoms

Bond in which electrons are completely transferred between atoms.

Fat, fat-like substances, and oils that do not dissolve in water and supply energy for the body processes and building of certain structures

The ability to do work.

One of two or more forms of an element having the same number of protons and electrons, but different number of neutrons, they may or may not be radioactive.

atoms with unstable nuclei

A liquid mixture in which the minor component is uniformly distributed within the major component.

the attraction of the positive end of a polar molecule, to the negative end of another polar molecule.

Substances made up of amino acids that are vital for many body functions, including structures and they functions, energy and hormonal requirements.

Fundamental substances that compose matter

Number of protons, plus the number of neutrons in the nucleus.

The number of protons in a nucleus

A type of mixtures with large, often visible solutes that usually settle.

a molecule that uses a covalent bond in which electrons are not shared equally; this results in a shape that has an uneven distribution of charges.

Substances (including sugars) that provide much of the energy required by the body cells and that help to build cell structures.

A tabular arrangment of the chemical elements.

A nucleus of an unstable atom loses energy by emitting radiation

The outside part of an atom surrounding the atomic nucleus, containing negatively charged particles.

A homogeneous substance consisting of large molecules of one substance dispersed through a second substance. The particles do not settle, and cannot be separated out by ordinary filtering.

A physical property of compounds which relate to other physical properties, such as melting and boiling points.

Proteins that catalyze biochemical reactions; in the body, they assist with digestion, protein formation, and drug metabolism.