Chemistry

123456789
Across
  1. 3. found to the left on the line
  2. 7. created the first periodic table
  3. 8. numbers what the periodic table is organized by today
  4. 9. row represents the principal quantum number
Down
  1. 1. in group 2 has 2 valence electrons
  2. 2. found to the right of the line
  3. 3. the elements found on the line
  4. 4. metals in the first row of the periodic table
  5. 5. excluded from group 1
  6. 6. atomic number of 94