Across
- 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.
- 5. non-metals are generally poor_____.
- 7. a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.
- 9. every element has a unique atomic number
- 10. the basic unit of a chemical element.
Down
- 1. number The____ is found above the chemical formula.
- 3. metallic elements are mostly ____.
- 4. elements found in groups have similar chemical properties.
- 5. a compound or substance that has been purified or prepared, especially artificially.
- 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.
- 8. a vertical column of elements is called a _____.