Periodic Table

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Across
  1. 2. a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
  2. 5. non-metals are generally poor_____.
  3. 7. a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
  4. 9. every element has a unique atomic number
  5. 10. the basic unit of a chemical element.
Down
  1. 1. number The____ is found above the chemical formula.
  2. 3. metallic elements are mostly ____.
  3. 4. elements found in groups have similar chemical properties.
  4. 5. a compound or substance that has been purified or prepared, especially artificially.
  5. 6. the systematic study of the structure and behavior of the physical and natural world through observation, experimentation, and the testing of theories against the evidence obtained.
  6. 8. a vertical column of elements is called a _____.