General Science Chemistry MCQs

Q.  After a nuclear disaster, the Strontium-90 becomes an health issue of great concern. What is the major concern about this particular isotope?

a. Strontium-90 gets deposited in the Red Blood Cells and causes Blood Cancer
b. Strontium-90 gets deposited in the Liver cells and causes Liver Cirrhosis
c. Strontium-90 gets deposited in bones and bone marrow and causes cancer
d. None of the above is a correct statement


ANSWER: See Answer
 
Strontium-90 is a “bone seeker” that exhibits biochemical behaviour similar to calcium, the next lighter Group 2 element. After entering the organism, most often by ingestion with contaminated food or water, about 70–80% of the dose gets excreted. Virtually all remaining strontium-90 is deposited in bones and bone marrow, with the remaining 1% remaining in blood and soft tissues. Its presence in bones can cause bone cancer, cancer of nearby tissues, and leukaemia. (wikipedia)
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