Assertion : 90 Sr from the radioactive fall out from a nuclear bomb ends up in the bones of human beings through the milk consumed by them. It causes impairment of the production of red blood cells. R

Question

Assertion : 90 Sr from the radioactive fall out from a nuclear bomb ends up in the bones of human beings through the milk consumed by them. It causes impairment of the production of red blood cells. Reason : The energetics β -particles emitted in the decay of 90 Sr damage the bone marrow.

TestHub · Accepted Answer

Assertion is true. 38 90 ​ Sr decays to 39 90 ​ Y by the emission of β -rays. Sr gets absorbed in bones along with calcium. Reason is also true. 90 Sr ⟶ β ​ 90 Y Strontium decays to Yitrium. This emits β -rays of very high energy. Sr does not emit γ -rays. The damage is by the β -rays only.

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