Across
- 2. number is the sum of protons & neutrons in the nucleus of an element
- 6. is any member of a large class of gaseous, liquid, or solid chemical compounds whose molecules contain carbon.
- 8. is a material system made up of two or more different substances which are mixed but are not combined chemically.
- 10. is a pure chemical substance consisting of a single type of atom distinguished by its atomic number, which is the number of protons in its atomic nucleus.
- 12. hand side above is mass number
- 15. are made when 2 or more atoms join together
- 16. number is no. of protons present in the nucleus of an element
- 17. in nature is atom
- 19. is the symbol of iron
Down
- 1. molecules are very loosely packed
- 3. of cobalt is co
- 4. is the old Latin name of copper
- 5. is uniform in composition
- 7. are positive
- 9. are negative
- 11. molecules are loosely packed
- 13. is the symbol of helium
- 14. molecules are tightly packed
- 16. is neutral in nature
- 18. A is represented as mass number