Worksheet Chapter 6: Periodic Table

1. Fill in the blank: The vertical columns in the Periodic Table are known as ________.

2. A student passes an electric current through acidulated water inside a Hofmann voltameter. (a) What chemical process is taking place? (b) Name the two gases collected at the electrodes and state their volume ratio.

3. Which technique is most suitable for obtaining pure salt crystals from a salt solution?

4. State the relative electrical charge for each of the three subatomic particles: (a) Proton, (b) Electron, (c) Neutron.

5. Explain how paper chromatography separates different pigments in food coloring.

6. Describe three key differences between a mixture and a compound.

7. True or False: Metals are generally malleable and ductile, whereas solid non-metals tend to be brittle.

8. True or False: Compounds can be easily separated into their constituent elements using physical methods like filtration.

9. Classify each substance as an Element, Compound, or Mixture: (a) Atmospheric air, (b) Pure Gold, (c) Carbon dioxide gas.

10. A mixture contains flour, iron nails, and common salt. Outline a 3-step physical process to isolate each component.