Integrated Ch 2 Vocabulary

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Across
  1. 3. average value based on the abundance of isotopes
  2. 6. pattern of frequencies of electromagnetic radiation emitted by the atoms of an element
  3. 8. dense, positively charged center of every atom
  4. 9. negatively charged subatomic particle found in a cloud outside the nucleus
  5. 12. neutral subatomic particle in the nucleus
  6. 13. A horizontal row in the periodic table
  7. 14. the same number of protons but different numbers of neutrons
  8. 15. fundamental unit of matter
Down
  1. 1. total number of protons and neutrons in the nucleus
  2. 2. number of protons in the atomic nucleus
  3. 4. A small packet of light energy
  4. 5. symbol abbreviation for an element or atom
  5. 7. vertical column in the periodic table
  6. 10. A positively charged subatomic particle in the nucleus
  7. 11. any material that is made up of only one type of atom