Periodic Table

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Across
  1. 3. — A horizontal row in the periodic table.
  2. 4. — A positively charged particle in the nucleus.
  3. 6. — The tiny building block that makes up all matter.
  4. 8. number — The number of protons in an atom.
  5. 9. — A negatively charged particle that moves around the nucleus.
Down
  1. 1. — A vertical column in the periodic table.
  2. 2. table — The chart that organises all the elements.
  3. 5. — A particle in the nucleus with no charge.
  4. 7. — Two or more atoms bonded together.
  5. 9. — A pure substance made of only one type of atom.