Periodic Table

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Across
  1. 3. is a notation of one or two letters representing a chemical element.
  2. 4. range from groups IIIB to XIIB on the periodic table.
  3. 6. energy is the amount of energy required to remove an electron from an atom creating a positvely charged ion.
  4. 7. atoms usually but not always representing more than one element.
  5. 8. a substance composed of atoms with identical atomic number.
  6. 10. is the numerical layout of electrons in the orbitals around the atom.
Down
  1. 1. a substance made of two or more elements that have bonded chemically.
  2. 2. comprise elements 89 through 103.
  3. 5. may be either stable or unstable.
  4. 9. is a measure of the attraction an atom has for electrons.