Chemistry Puzzle

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Across
  1. 2. last familiy in the periodic table
  2. 5. first group of the periodic table
  3. 8. A distinct group of atoms bonded together
  4. 9. common subgroup element
  5. 10. An atom that has the same number of protons/atomic number as other atoms of the same element do but that has a different number of neutrons/atomic mass
Down
  1. 1. Name of the rows in the periodic table
  2. 3. Most abundant metal on earth
  3. 4. An electron in the outer shell of an atom
  4. 6. Has a neutral charge and is found in the nucleus
  5. 7. Kind of particles that include protons, electrons and neutrons