Question

3. (a) Write one important application of iodine 131 isotope.
(b) What are nucleons? What is their number called?
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Answer 1

Answer:

(b)In chemistry and physics, a nucleon is either a proton or a neutron, considered in its role as a component of an atomic nucleus. The number of nucleons in a nucleus defines an isotope's mass number. Until the 1960s, nucleons were thought to be elementary particles, not made up of smaller parts.

Explanation:

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