Write uses of Co-60 and U-235

CBSE Class 9 CBSE Class 9 Science
,
1

(i) Write two differences between isobars and isotopes.
(ii) Write uses of Co-60 and U-235.

2

(i) Difference between isobars and isotopes:
Isotopes:
1.These are the atoms of the same element having same atomic number but different mass numbers.
2.They have identical chemical properties and different physical properties. Eg. ${}{1}^{1}H$
Isobars:
1.These are the atoms of the different having same mass number but different atomic numbers.
2.They have different chemical properties and different physical properties because these are atoms of different elements. Eg: ${}{18}^{40}Ar$
(ii) Isotope of cobalt (Co-60) is used in the treatment of cancer.
Isotope of uranium (U-235) is used as a fuel in nuclear reactor.