2 Mark of Elements and Compounds

 20 two-mark questions on "Elements and Compounds" in Basic Chemistry:

  1. Define an element in terms of chemistry.
  2. What is a compound? Give an example.
  3. How do elements differ from compounds?
  4. Explain the term "molecule" with an example.
  5. Name two physical properties that can distinguish elements from compounds.
  6. Why can compounds be separated into simpler substances but elements cannot?
  7. Give an example of an element and a compound with similar physical states.
  8. How many elements are currently known? Provide a rough estimate.
  9. What are atoms, and how do they relate to elements?
  10. Name two elements that are gases at room temperature.
  11. What is meant by a chemical formula? Give an example.
  12. Explain why water is considered a compound.
  13. How are compounds represented in chemistry?
  14. What is a diatomic molecule? Give an example.
  15. Differentiate between a molecule and an atom.
  16. Why do elements in the same group of the periodic table often form similar compounds?
  17. Give the chemical formula of one common compound and identify its elements.
  18. State the difference between a homonuclear and heteronuclear molecule with examples.
  19. What is the difference between ionic and covalent compounds?
  20. Explain the Law of Definite Proportions with an example.

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