Parts of a Periodic Table Review

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Across
  1. 2. The negatively charged particles in an atom.
  2. 4. The element name with the symbol, He.
  3. 5. These are found to the right of the table. They are brittle and poor conductors of heat and electricity.
  4. 8. A horizontal row of elements (from left to right) on the periodic table
  5. 10. The average mass of all the isotopes of that element. Also, tells us the number of protons plus the the number of neutrons.
Down
  1. 1. The positively charged particles of the nucleus of an atom.
  2. 3. The particles of the nucleus that have no charge.
  3. 6. These are the elements that border the zigzag line of the periodic table. They have the properties of both metals and nonmetals. There are only 7 of them.
  4. 7. These are found to the left of the table. They are shiny, malleable, ductile, and good conductors of heat and electricity.
  5. 9. A column of elements (from top to bottom) on the periodic table