Across
- 1. / An indivisible and basic unit of matter
- 6. / It is the study of matter and the changes it undergoes
- 9. / The centre of an atom is called ____
- 10. / NH3
- 12. / Unit of measurement of time
- 13. / Blue litmus paper turns ____ under acidic conditions
Down
- 2. / The only metal that is in liquid form at room temperature
- 3. / It is defined as mass divided by volume
- 4. / The mechanical process to separate solids from the fluids
- 5. / The process through which a substance changes from liquid to solid
- 7. / A strong base that dissovels in water
- 8. / Positive ions are called _____
- 11. / Anything that has mass and occupies volume