Multiple Choice
Gamma rays are
21. Nuclear Chemistry
Intro to Radioactivity
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A N/Z ratio close to 1 is most stable
A
at high values of Z.
B
at low values of Z.
C
at all values of Z.
D
When Z is greater than 83.
E
Never; N/Z = 1 is never stable.
Verified step by step guidance1
Understand the concept of N/Z ratio: The N/Z ratio refers to the ratio of neutrons (N) to protons (Z) in a nucleus. A stable nucleus typically has a balanced N/Z ratio.
Recognize the stability trend: For lighter elements (low Z), a N/Z ratio close to 1 is generally stable. As Z increases, the number of neutrons needed for stability increases, leading to a higher N/Z ratio.
Consider the implications of high Z values: For elements with Z greater than 83, the N/Z ratio needs to be greater than 1 to maintain stability due to the increased repulsion between protons.
Evaluate the options: Analyze each given option in the context of nuclear stability and the N/Z ratio. Consider how the stability changes with increasing Z.
Conclude based on nuclear stability principles: Determine which option correctly describes the stability of a N/Z ratio close to 1, considering the typical behavior of nuclei at different Z values.
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