Chemistry
Give the use of the following isotopes:
(a) Radioactive isotopes
(b) 235U
(c) 60Co
(d) 131I
(e) 14C
Answer
(a) Radioactive isotopes — Used in industry to detect the leakage in underground oil pipelines, gas pipelines and water pipelines.
(b) 235U — Used as fuel in nuclear reactors.
(c) 60Co — used in radiotherapy for treating cancer and other diseases.
(d) 131I — Used in treatment of goitre.
(e) 14C — Used for determining the age of historical and geological material.
Related Questions
Give reasons
(a) Physical properties of isotopes are different.
(b) Argon does not react.
(c) Actual atomic mass is greater than mass number.
(d) 3517Cl and 3717Cl do not differ in their chemical reactions.
Complete the following table relating to the atomic structure of some elements.
Element Symbol Atomic Number Mass Number Number of Neutrons Number of Electrons Number of Protons Li 3 6 Cl 17 20 Na 12 11 Al 27 13 S 32 16 How does the Modern atomic theory contradict and correlate with Dalton's atomic theory?
Explain:
(a) octet rule for formation of a chemical compound.
(b) duplet rule for formation of hydrogen.