Atoms

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Across
  1. 1. the total number of protons and neutrons in the nucleus of an atom (two words)
  2. 6. An atom or group of atoms that has a positive or negative charge.
  3. 7. an electron that is found in the outermost shell of an atom and that determines the atom's chemical properties (two words)
  4. 9. A horizontal row of elements in the periodic table
  5. 10. A subatomic particle that has no charge and that is found in the nucleus of an atom
  6. 13. an element that is a poor conductor of heat and electricity
  7. 14. the number of protons in the nucleus of an atom (two words)
  8. 15. A substance made up of atoms of two or more different elements joined by chemical bonds
Down
  1. 2. The energy that allows atoms to stick together (two words)
  2. 3. A pure substance made of only one kind of atom; found on the periodic table
  3. 4. A table that shows the elements, their atomic number, symbol, and average atomic mass; elements with similar chemical properties are grouped together.(two words)
  4. 5. A subatomic particle that has a negative charge and found outside the nucleus
  5. 8. Basic unit of matter
  6. 9. A subatomic particle that has a positive charge and that is found in the nucleus of an atom
  7. 11. A class of elements characterized by physical properties that include shininess, malleability, ductility, and conductivity.
  8. 12. Vertical column in the periodic table
  9. 14. Unit of measurement (amu) for an atom (two words)