The periodic properties ICSE

ICSE Class 10 Chemistry – Periodic Properties

1. The modern periodic law states that the properties of elements are periodic functions of their:

A) Atomic masses

B) Atomic numbers

C) Mass numbers

D) Neutron numbers

2. Which of the following has the smallest atomic radius?

A) Na

B) Mg

C) Al

D) Cl

3. Across a period from left to right, the atomic size generally:

A) Increases

B) Decreases

C) Remains constant

D) First increases and then decreases

4. Which element has the highest ionisation potential among the following?

A) Na

B) Mg

C) Al

D) Cl

5. The tendency of an atom to attract the shared pair of electrons towards itself is called:

A) Ionisation energy

B) Electron affinity

C) Electronegativity

D) Atomicity

6.Which of the following elements has the highest electronegativity?

A) F

B) Cl

C) Br

D) I

7.On moving down a group, the atomic size generally:

A) Decreases

B) Increases

C) Remains unchanged

D) Becomes zero

8. Which pair of elements belongs to the same group?

A) Na and Mg

B) Li and Na

C) Na and Cl

D) Mg and Cl

9.Metallic character generally ______ from left to right across a period.

A) Increases

B) Decreases

C) Remains the same

D) First decreases and then increases

10.An element has electronic configuration 2, 8, 7. It belongs to:

A) Group 1, Period 3

B) Group 17, Period 3

C) Group 17, Period 2

D) Group 18, Period 3

Answers

1. B) Atomic numbers

2. D) Cl

3. B) Decreases

4. D) Cl

5. C) Electronegativity

6. A) F

7. B) Increases

8. B) Li and Na

9. B) Decreases

10. B) Group 17, Period 3