Periodic Table Vocabulary

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Across
  1. 2. A table of the chemical elements arrange din order of atomic number.
  2. 5. A horizontal row on the periodic table,
  3. 7. The number of protons in the nucleus of an atom.
  4. 9. A positively charged particle.
  5. 10. The central core of an atom that contain the protons and the nucleus.
Down
  1. 1. A one or two letter abbreviation used to represent a chemical element.
  2. 3. mass The total number of protons and neutrons in the nucleus of an atom.
  3. 4. A particle of an atom that does not have an electrical charge. Makes up most of the mass of an atom.
  4. 6. A negatively charged particle of an atom.
  5. 8. A vertical column on the periodic table. Members of the same group have the same number of electrons in their outer most layer.