Radioactive Isotopes and Decay

The video tutorial by Mr. Atole introduces the concept of radioactive decay, focusing on the decay table from the reference tables. It explains the transformation of parent isotopes into daughter isotopes, emphasizing the concept of half-life. Detailed examples of carbon-14, potassium-40, uranium-238, and rubidium decay processes are provided, highlighting the time it takes for these transformations. The tutorial aims to clarify the exponential nature of decay and its significance in understanding radioactive elements.

Which of the following elements is NOT mentioned as a radioactive isotope in the introduction?

• Potassium

• Helium

• Carbon

• Uranium

What is the term used for the original isotope before it decays?

• Daughter

• Child

• Ancestor

• Parent

Carbon-14 decays into which element over time?

• Oxygen

• Nitrogen

• Helium

• Argon

How many years does it take for half of Carbon-14 to decay into Nitrogen-14?

• 49,000 years

• 5,700 years

• 1,300 years

• 4,500 years

Potassium-40 decays into which two elements?

• Argon and Calcium

• Lead and Strontium

• Carbon and Oxygen

• Nitrogen and Helium

What is the half-life of Potassium-40 in years?

• 4.5 billion

• 1.3 billion

• 1.3 million

• 49 billion

Uranium-238 decays into which element?

• Strontium

• Argon

• Lead

• Calcium

How many years does it take for half of Uranium-238 to decay into Lead?

• 1.3 billion

• 4.5 billion

• 49 billion

• 5,700

Rubidium decays into which element?

• Calcium

• Argon

• Lead

• Strontium

What is the half-life of Rubidium in years?

• 5,700

• 1.3 billion

• 4.5 billion

• 49 billion