chemistry

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Across
  1. 4. a stable subatomic particle with a charge of negative electricity.
  2. 6. a gentle sheen or soft glow.
  3. 7. the basic unit of a chemical element.
  4. 10. a subatomic particle of about the same mass as a proton, but without any electric charge
Down
  1. 1. a stable subatomic particle with a positive charge.
  2. 2. whose properties are intermediate between those of metals and solid nonmetals or semiconductors
  3. 3. a set of elements occupying an entire horizontal row in the periodic table.
  4. 5. easy to break or shatter easily.
  5. 8. any substance that has mass and takes up space by having volume.
  6. 9. a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction