Basics of the periodic table

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Across
  1. 5. A vertical column of elements in the periodic table
  2. 7. A negatively charged subatomic particle that orbits the nucleus of an atom
  3. 8. A subatomic particle with no charge, found in the nucleus of an atom
Down
  1. 1. A substance that cannot be broken down into simpler substances by chemical means
  2. 2. A positively charged subatomic particle found in the nucleus of an atom
  3. 3. The basic unit of a chemical element
  4. 4. A substance that is typically hard, shiny, malleable, and ductile, and conducts electricity and heat well
  5. 6. A horizontal row of elements in the periodic table