By Dinicha Lubin & Johanna Henry

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Across
  1. 5. : I orbit the nucleus and have a negative charge.
  2. 8. : An element has 5 valence electrons and is found in Period 2. What element am I?
  3. 9. : I am the number of protons in an atom.
  4. 10. : I am a pure substance made up of only one type of atom.
Down
  1. 1. : I am located in the nucleus and have a positive charge.
  2. 2. : I am a vertical column on the periodic table.
  3. 3. : I am the weighted average mass of the isotopes of an element.
  4. 4. : I am a horizontal row on the periodic table.
  5. 6. : An atom has 6 protons and 6 electrons. What is its charge?
  6. 7. : I am the smallest particle of an element that retains its identity.