Atoms and Structures Crossword

the smallest piece of an element that still represents that element
the science that deals with the composition and properties of substances and various elementary forms of matter
fluid that conforms to the shape of its container
a substance possessing perfect molecular mobility and the property of indefinite expansion
having three dimensions (length, breadth, and thickness)
the integer nearest in value to the atomic weight of an atom and equal to the number of nucleons in the nucleus of the atom
the group of electrons revolving around the nucleus of an atom
the number of positive charges or protons in the nucleus of an atom of a given element
the elementary particles that make up the protons and neutrons that in turn make up the atomic nucleus
the substance or substances of which any physical object consists or is composed
the amount of matter in an object
the region in the center of an atom where most of an atom's mass and positive charge is concentrated
a neutral particle in the nucleus of an atom
any element that spontaneously emits radiation
found in atomic nuclei in numbers equal to the atomic number of the element
a stable elementary particle present in all atoms
any of two or more forms of a chemical element
a process that occurs when an unstable atomic nucleus changes in to another stable nucleus
the average mass of the element's isotopes
a table illustrating the periodic system