Across
- 2. Fe stands for
- 4. first element in the periodic table
- 7. He stands for
- 8. most reactive element
- 9. the periodic table is arrange with the elements atomic
- 10. elements with different number of atoms are called
Down
- 1. Kr stands for
- 3. Cl stands for
- 5. Ga stands for
- 6. elements are made of