Periodic Table

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Across
  1. 5. The number of electrons in an atom is ..... to the number of protons.
  2. 6. Neutral particles made up of two or more atoms.
  3. 7. Non-metals are brittle while metals are .......
  4. 8. The only non-metal element that can conduct electricity.
  5. 9. Subatomic particle with negative charge.
Down
  1. 1. Simplest form of substance.
  2. 2. Two or more elements combined chemically.
  3. 3. Process of sword-making is an example of ............
  4. 4. Protons and neutrons are inside the ....... of an atom.
  5. 6. Shiny, good electrical and heat conductor is characteristics of ..... elements