Module 2 - Atoms and Reactions

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OCR GCE A-Level Chemistry - Module 2 - Atoms and Reactions

Chemistry

OCR_A

11th

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[2.1.1] What is an ISOTOPE?
Atoms of the same element with different numbers of neutrons and different masses.
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[2.1.1] What is meant by the term 'RELATIVE ISOTOPIC MASS'?
The mass compared with 1/12th the mass of carbon-12.
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[2.1.1] What is meant by the term 'RELATIVE ATOMIC MASS'?
The weighted mean mass compared with 1/12th the mass of carbon-12.
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[2.1.1] How can a MASS SPECTROMETER be used?
A mass spectrometer can quickly determine which isotopes are present and the relative quantity of each.