Atomic Vocabulary Crossword

the smallest unit of a chemical element that has all of the properties of that element; basic building block of matter
positively charges mass within an atom composed of neutrons and protons, and possessing most of the mass but occupying only a small fraction of the volume of an atom
positively charges subatomic particle with significant mass located withing the nucleus of a an atom
neutral subatomic particle with significant mass located within the nucleus of an atom
negatively charges subatomic particle with insignificant mass located outside of the nucleus of an atom
an outer shell electron that is associated with the formation of chemical bonds
a measure of the tendency of an atom to attract a bonding pair of electrons
property or characteristics of a substance that is observed during a reaction in which the chemical composition or identity of the substance is changed
number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table
mass of an atom of a chemical element expressed in atomic mass units; approximately equivalent to the number of protons and neutrons in the atom or to the average number allowing for the relative abundances of different isotopes
atoms of the element that contain equal numbers of protons but different numbers of neutrons in their nuclei