Question

The element strontium ( Sr ) belongs to the same group as calcium (Ca) in the periodic table. Sr has similar chemical properties to Ca. Suggest a reason why exposure to strontium-90, a product of nuclear testing in the atmosphere is especially hazardous for children.

Answer 1

Exposure to strontium-90 is especially hazardous for children because it is chemically similar to calcium and can be absorbed by the body, becoming incorporated into developing bones, thus increasing the risk of radiation-induced diseases.

Step-by-step explanation:

Strontium (Sr) belongs to the same Group 2: The Alkaline Earth Metals as calcium (Ca) and shares similar chemical properties, including their tendency to form compounds with an oxidation state of 2+. The radioactive isotope strontium-90 (90Sr) is of significant concern when it comes to public health, especially for children, due to the similarity to calcium.


This is because 90Sr can be absorbed by the body and deposited in the bones just like calcium. This is particularly dangerous for children, as their bones are developing rapidly, and the incorporation of 90Sr into their bones can lead to an increased risk of bone cancer and leukemia due to the ionizing radiation emitted by this isotope.