The Isotopes of Promethium, and

question 2

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

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Definitions:

Preoperational Child

A stage in Piaget's theory of cognitive development where children, typically aged 2-7, are not yet able to think logically or understand the concept of conservation.

Another's Point Of View

The ability to understand and consider the perspective, feelings, and thoughts of someone else, essential for empathy and social interaction.

Egocentrism

The inability to differentiate between self and other, often seen in early childhood development, leading individuals to assume that others share their viewpoints.

Preschool Children

Young children typically aged between three and five years, often undergoing early education before starting compulsory schooling.