christina herron week 6 vocab

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Across
  1. 1. a vertical row of the periodic table.
  2. 4. a horizontal row of the periodic table.
  3. 6. commonly cited in distinguishing among the isotopes of an element
  4. 7. the number of a chemical element in the periodic system and on the periodic table
  5. 9. a subatomic particle that has negative charge
Down
  1. 2. arranged in order of atomic number.
  2. 3. the smallest unit of an element that maintains the property of the element.
  3. 4. a subatomic particle that has a positive charge and that is located in the nucleus of an atom; the number of protons in the nucleus is the atomic number, which determines the identity of an element
  4. 5. a substance that can not be separated or broken down into simpler substances.
  5. 8. a subatomic particle that has no charge and that is located in the nucleus of an atom