Mass number and isotopes (3.1.1.2) | AQA A-level Chemistry - (7405) | KnowledgeSet

Mass number and isotopes

Chemistry · A-Level · AQA · AQA A-level Chemistry - (7405) · Specification point · 3.1.1.2 · Physical chemistry · Atomic structure

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3.1.1.2 Mass number and isotopes

Content	Opportunities for skills development
$Mass number (A) and atomic (proton) number (Z). Students should be able to: determine the number of fundamental particles in atoms and ions using mass number, atomic number and charge explain the existence of isotopes. The principles of a simple time of flight (TOF) mass spectrometer, limited to ionisation, acceleration to give all ions constant kinetic energy, ion drift, ion detection, data analysis. The mass spectrometer gives accurate information about relative isotopic mass and also about the relative abundance of isotopes. Mass spectrometry can be used to identify elements. Mass spectrometry can be used to determine relative molecular mass. Students should be able to: interpret simple mass spectra of elements calculate relative atomic mass from isotopic abundance, limited to mononuclear ions.$	$MS 1.1 Students report calculations to an appropriate number of significant figures, given raw data quoted to varying numbers of significant figures. MS 1.2$

Content

Opportunities for skills development

Mass number (A) and atomic (proton) number (Z). Students should be able to: determine the number of fundamental particles in atoms and ions using mass number, atomic number and charge explain the existence of isotopes. The principles of a simple time of flight (TOF) mass spectrometer, limited to ionisation, acceleration to give all ions constant kinetic energy, ion drift, ion detection, data analysis. The mass spectrometer gives accurate information about relative isotopic mass and also about the relative abundance of isotopes. Mass spectrometry can be used to identify elements. Mass spectrometry can be used to determine relative molecular mass. Students should be able to: interpret simple mass spectra of elements calculate relative atomic mass from isotopic abundance, limited to mononuclear ions.

MS 1.1 Students report calculations to an appropriate number of significant figures, given raw data quoted to varying numbers of significant figures. MS 1.2