Across
- 6. are very reactive
- 7. whose properties are intermediate between those of metals and solid nonmetals or semiconductors.
- 9. are Neutral
- 14. are a malleability, ductility, and high reflectivity of light.
- 15. are reactive nonmetallic elements that form strongly acidic compounds with hydrogen from which simple salts can be made.
- 16. are any of the gaseous elements helium
Down
- 1. are only change the appearance of a substance, not its chemical composition.
- 2. are a horizontal line in the periodic table
- 3. are when one chemical substance is transformed into one or more different substances
- 4. is a chemical elements arranged in order of atomic number usually in rows so that elements with similar atomic structure
- 5. are each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter.
- 8. are a column in the periodic
- 10. are negative
- 11. are positive
- 12. are an element/substance that is not element
- 13. are very reactive metals