Across
- 5. common salt also called as
- 6. group of different type of atoms
- 8. supporter for combustion
- 10. total of protons and neutrons in atom
Down
- 1. first element in periodic table
- 2. vertical columns in periodic table
- 3. solid form of water
- 4. place where protons and neutrons are together
- 7. point where solid turns into liquid
- 9. negatively charged particle in an atom