Across
- 4. matter with no defined volume and shape
- 6. number of protons in an atom
- 7. metal, used in computer chip
- 8. stranger's gas
- 10. an atom or molecule with net charge
- 12. ....energy is energy required to start the reaction.
- 13. type of material tat is considered as good conductor of heat and electricity
Down
- 1. a test in laboratory
- 2. gradual destruction of metal
- 3. atom bonded to four different species.
- 5. type of solid, irregular structure
- 9. chief component in biogas
- 11. type of bond, between atoms of electronegativity difference