Examlex
Which of the following statements about isotopes is/are correct?
i.They have different masses
ii.They have different numbers of neutrons
iii.They have different electrical charges
iv.They have different nuclear symbols
v.They have different mass numbers
Objective Viewpoint
An unbiased perspective that is not influenced by personal feelings or opinions, focusing on observable and factual information.
Validity
The degree to which a tool, test, or study accurately measures what it intends to measure or accurately reflects the reality it aims to represent.
Reliability
The consistency and stability of a test, measurement, or instrument over time or different conditions.
Multiple-choice
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