Parts of the periodic table

Edit Answers
123456789101112
Across
  1. 2. Family name of the inner transition elements found on period 6.
  2. 4. Elements in the periodic table are arranged according to ________________, the number of protons in the nucleus.
  3. 6. Identifies the principal families of elements
  4. 8. _______________ is the family usually found to have the most electronegative elements, such as Fluorine.
  5. 9. _________________ transition elements are elements whose valence electrons are in the f-orbital.
  6. 10. _____________ metals are the leftmost family in the periodic table and are usually the least electronegative.
  7. 11. Family name of the inner transition elements found on period 7.
  8. 12. Group 18, also called _____________ gases, have the lowest chemical reactivity.
Down
  1. 1. The elements in groups 1, 2, and 13-18 are called __________________ elements.
  2. 3. Elements were initially thought to be arranged according to increasing atomic _______________.
  3. 5. Groups 3-12 are collectively referred to as _________________ elements, elements with partially filled d-orbitals.
  4. 7. Rows of elements with the same highest electron energy level