What is the convergent frequency/ ionisatoin energy drawn?
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Card 18
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*11 The first four ionisatoin energies (kJ) for an element are; 738, 1451, 7733, 10541. State and explain to which group in the periodic table the element belongs.
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Card 19
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*12 Two lines in the emission spectrum of atomic hydrogen have the following frequencies 460 THz and 690 THz. State and explain which one has the higher (a) energy (b) frequency
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Card 20
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*13 State briefly the difference between absorption and emission spectra
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Card 21
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*14 In the atomic spectrum of hydrogen, why do the spectral lines get closer at the high frequency end of the Balmer series?
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Card 22
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*10 Write an equation to represent the second ionisation energy of magnesium.
