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Structure 1.3 Electron configurations HL 

Structure 1.3.6
Understandings:

• In an emission spectrum, the limit of convergence at higher frequency corresponds to ionisation.

Learning outcome(s):

• Explain the trends and discontinuities in first ionisation energy (IE) across a period and down a group.
• Calculate the value of the first IE from spectral data that gives the wavelength or frequency of the convergence limit.

Additional notes 

• The value of the Planck constant h and the equations E = hf and c = λf are given in the data booklet.

This video covers how to calculate the first ionisation energy from the wavelength or frequency of the convergence limit. ​

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Structure 1.3.7
Understandings:

• Successive ionisation energy (IE) data for an element give information about its electron configuration.

Learning outcome(s):

• Deduce the group of an element from its successive ionisation data.

Additional notes: 

• Databases are useful for compiling graphs of trends in IEs.

This video covers how to deduce the group number of an element from its successive ionisation data. 

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