Across
- 3. CO is symbol for
- 5. Anions which contain single atoms with a negative charge
- 7. A union who recommended method to write atomic symbols of elements
- 11. This ion is required in our body for strengthening of bones
- 13. CCl4 is symbol for
- 15. Chemist who simplified the system by using letters of the alphabets alone
- 17. Chemist who represented the atoms of different elements using symbols
- 18. NaCl is symbol for
- 20. Co2 is symbol for
Down
- 1. an instrument which can directly produce the image of the atom that lie on the surface of an element
- 2. An electrically charged atom of an element
- 4. The new substances produced in the reaction
- 6. The ultimate particle of a chemical compound
- 8. PCl3 is symbol for
- 9. The method of representing a chemical reaction with the help of symbols and formulae of the substances involved in it
- 10. The substances which combine or react
- 12. A compound made up of only two elements
- 14. An abbreviation or short representation of the chemical name of an element is known as
- 16. Groups of atoms that react as single atoms and keep their identity in many reactions
- 19. The ultimate particle of an element
