Science Crossword

The smallest particle of elements.
a thing that is composed of two or more separate elements; a mixture.
a piece of a homogeneous solid substance having a natural geometrically regular form with symmetrically arranged plane faces.
a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
a part or aspect of something abstract, especially one that is essential or characteristic
the fixed amount of energy that a system described by quantum mechanics, such as a molecule, atom, electron, or nucleus, can have.
an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy.
a substance made by mixing other substances together.
a three-dimensional representation of a person or thing or of a proposed structure, typically on a smaller scale than the original.
a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 0 (18) of the periodic table. They were long believed to be totally unreactive but compounds of xenon, krypton, and radon are now known.
the central and most important part of an object, movement, or group, forming the basis for its activity and growth.
a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
based on or characterized by the methods and principles of science.