List of practice Questions

Explain with examples
(i) Atomic number,
(ii) Mass number,
(iii) Isotopes
(iv) Isobars.
Give any two uses of isotopes.

Composition of the nuclei of two atomic species X and Y are given as under 

	X	Y
Protons	6	6
Neutrons	6	6

Give the mass numbers of X and Y. What is the relation between the two species?

Complete the following table.

Atomic Number	Mass Number	Number of Neutrons	Number of Protons	Number of Electrons	Number of the Atomic Species
9	-	10	-	-	-
16	32	-	-	-	Sulphur
-	24	-	12	-	-
-	2	-	1	-	-
-	1	0	1	0	-