6.a radionuclides

Strontium-90 (90Sr2+) is analogous to which ion?

• Na+

• K+

• Ca2+

• Mg2+

What is one of the risks associated with Strontium-90?

• It can cause heart disease.

• It can substitute for calcium in foodstuffs.

• It can cause diabetes.

• It can substitute for potassium in foodstuffs.

Which of the following is a remediation method for Strontium-90 contamination?

• Addition of NaCl

• Addition of CaCO3

• Addition of KCl

• Addition of MgSO4

What is a potential health effect of Strontium-90 contamination in foodstuffs?

• Diabetes

• Bone cancer

• Heart disease

• Liver failure

Which of the following is NOT a characteristic of Strontium-90?

• Analogous to Ca2+

• Exchangeable cation on clays and humus

• Rapid fixation in CaCO3 and Ca-phosphates

• Slow fixation in CaCO3 and Ca-phosphates

What is the process depicted in the diagram?

• Diffusion of Sr2+ ions into a calcareous matrix

• Evaporation of water from CaCO3

• Precipitation of Sr2+ ions from a solution

• Melting of CaCO3

What is the chemical formula for Calcium Carbonate as shown in the diagram?

• CaCO3

• CaSO4

• CaCl2

• CaO

What ions are chemi-sorbed onto the Calcium Carbonate in the diagram?

• Sr2+ ions

• Ca2+ ions

• CO3 2- ions

• Na+ ions

What substance's content in milk rose substantially following 'last chance' bomb tests in the early 1960s?

• Strontium-90

• Iodine-131

• Cesium-137

• Plutonium-239

The epidemiological study mentioned in the image was conducted in which location?

• Suffolk County, New York, USA

• Los Angeles, California, USA

• London, England

• Tokyo, Japan