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