Atoms - An Introduction to Radioactivity Crossword Puzzle

QUESTIONS LIST: atom : the smallest particle of an element that retains all the properties of that element, compound : a chemical combination of two or more different elements, molecule : forms when two or more atoms are chemically bonded, atomic mass : the average mass of the isotopes of that element. the combined mass of protons and neutrons, atomic number : the number of protons in an atom, electron : a negatively charged, fast-moving particle with an extremely small mass and is located outside of the nucleus, neutron : a neutral, sub-atomic particle located inside an atom's nucleus that has a neutral charge, 0, proton : a sub-atomic particle located inside an atom's nucleus that has a positive charge, +1, chemical bond : this holds two atoms together, ion : an atom or group of atoms with a positive or negative charge, element : a pure substance that cannot be broken down into a simpler substance, nucleus : the location of the nucleons, nucleon : the name for a subatomic particle found in the center of the atom, empty space : most of the atom is made of this, positive : the overall charge of the nucleus, neutral : the overall charge of the atom