Periodic

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Across
  1. 1. Mass – The average mass of an element’s atoms.
  2. 3. – A positively charged particle found in the nucleus.
  3. 6. – A negatively charged particle that moves around the nucleus.
  4. 7. Electrons – Electrons in the outer shell that are involved in bonding.
  5. 10. – A horizontal row on the periodic table.
  6. 11. – A particle with no charge found in the nucleus.
  7. 14. Number – The number of protons in the nucleus of an atom.
Down
  1. 2. – An element that has properties of both metals and nonmetals.
  2. 4. – The center of an atom that contains protons and neutrons.
  3. 5. – A vertical column on the periodic table where elements have similar properties.
  4. 8. – The smallest unit of an element that keeps the properties of that element.
  5. 9. – A pure substance made of only one type of atom.
  6. 10. Table – A chart that organizes elements based on their atomic number and properties.
  7. 12. – An element that is shiny, conducts heat and electricity, and is usually solid.
  8. 13. – An element that does not conduct heat or electricity well.