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