Across
- 3. made the concept of the atomic number
- 5. metal elements in the d-block of the periodic table
- 9. Russian table maker
- 11. the 22nd letter of the English alphabet
- 12. the table
Down
- 1. is best known for his model of the atom
- 2. a horizontal row of elements
- 4. vertical columns of elements
- 6. metals the six elements in group 1
- 7. earth metal are a group of six chemical elements in group 2 of the periodic table
- 8. an element with properties that is mix
- 10. are a large group of elements found in the middle