WILLER ACADEMY

Class 10 Science Chapter 5 Quiz

Periodic Classification of Elements

1. Who gave the Modern Periodic Law?
a) Mendeleev b) Newlands c) Moseley d) Dobereiner

2. What is the basis of the Modern Periodic Table?
a) Atomic mass b) Atomic number c) Valency d) Number of neutrons

3. Which of the following is the most electropositive element?
a) Sodium b) Potassium c) Lithium d) Caesium

4. Which group contains noble gases in the Modern Periodic Table?
a) Group 1 b) Group 17 c) Group 18 d) Group 2

5. Which of the following elements has the smallest atomic size?
a) Na b) Mg c) Al d) Si

6. State the Modern Periodic Law. (2 marks)

7. What are isotopes? Give one example. (2 marks)

8. Write three differences between Mendeleev’s and Modern Periodic Table. (3 marks)

9. How does metallic character vary across a period and down a group? (3 marks)

10.
a) Explain the trends in atomic size and valency in the Modern Periodic Table.
b) Why are noble gases placed in a separate group? (5 marks)

Your Result & Analysis