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The Isotopes of Promethium, and , Are Unstable $\beta$

question 16

Multiple Choice

The isotopes of promethium, $The isotopes of promethium, and , are unstable, and lie on opposite sides of the line of stability. Which of the following combinations is most likely to represent the type of decay for these isotopes? A) promethium-144, \beta decay; promethium-134, positron decay B) promethium-144, positron decay; promethium-134, \beta decay C) promethium-144, positron decay; promethium-134, electron capture D) promethium-144, electron capture; promethium-134, positron decay E) promethium-144, \beta decay; promethium-134, \gamma decay$ and $The isotopes of promethium, and , are unstable, and lie on opposite sides of the line of stability. Which of the following combinations is most likely to represent the type of decay for these isotopes? A) promethium-144, \beta decay; promethium-134, positron decay B) promethium-144, positron decay; promethium-134, \beta decay C) promethium-144, positron decay; promethium-134, electron capture D) promethium-144, electron capture; promethium-134, positron decay E) promethium-144, \beta decay; promethium-134, \gamma decay$ , 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?

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The Isotopes of Promethium, and , Are Unstable β\betaβ

Definitions:

The Isotopes of Promethium, and , Are Unstable $\beta$