Chapter 10 Definitions Crossword Puzzle

12345678910
Across
  1. 1. each vertical column of the periodic table
  2. 3. a negatively charged subatomic particle
  3. 4. an atom that has the same number of protons but a different number of neutrons
  4. 6. positively charged subatomic particles
  5. 7. the smallest particle of an element that retains its identity in a chemical reaction
  6. 8. the total number of protons and neutrons in an atom
  7. 10. the tiny central core of an atom and is composed of protons and neutrons
Down
  1. 2. an arrangement of elements in which the elements are separated into groups based on a set of repeating properties
  2. 5. each horizontal row of the periodic table
  3. 9. subatomic particles with no charge but with a mass nearly equal to that of a proton