The Isotopes of Promethium, and Are Unstable, and Lie

question 33

Multiple Choice

The isotopes of promethium, and are unstable, and lie on opposite sides of the "line of stability". Which of the following combinations is most likely to represent the type of decay for these isotopes?

• A) promethium-144,  decay; promethium-134, positron decay
• B) promethium-144, positron decay; promethium-134,  decay
• C) promethium-144, positron decay; promethium-134, electron capture
• D) promethium-144, electron capture; promethium-134, positron decay
• E) promethium-144,  decay; promethium-134,  decay

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Definitions:

Energy Waves

Oscillations that transfer energy from one place to another, such as sound waves, light waves, or electromagnetic waves.

Hydrolysis Reactions

Hydrolysis reactions involve the chemical breakdown of a compound due to its reaction with water.

Dehydration

The condition that results when the body loses more water than it takes in, leading to insufficient water to carry out normal functions.

Synthesis

The process of combining different elements or components to form a complex whole, often used in chemistry and biology.