Mass spectrometer is used to determine Mass number of isotopes and___________________?
Correct answer: B. Relative abundance
- A. Atomic number
- B. Relative abundance
- C. Electronic configuration
- D. All of the above
Explanation
A mass spectrometer separates ions according to their mass-to-charge ratios and records their intensities, allowing the mass numbers and relative abundances of isotopes to be determined. The common mistake is choosing all of the above, because a mass spectrometer does not directly determine atomic number or electronic configuration.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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