Periodic Table

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Across
  1. 2. Sequences of elements in periodic table in order of increasing atomic number
  2. 4. Nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table
  3. 5. Members of a family of an element that all have the same number of protons but different numbers of neutrons
  4. 9. A molecule or ion that can react both as an acid and as a base
  5. 10. Subatomic particle found in the nucleus of every atom except that of simple hydrogen.
Down
  1. 1. A Russian chemist and is considered the "father" of the periodic table
  2. 3. The process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons, often in conjunction with other chemical changes
  3. 6. Subatomic particle with a positive charge
  4. 7. Negatively charged subatomic particles located in orbitals surrounding the nucleus
  5. 8. Sequences of elements in periodic table with increasing number of electron shells