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The first ionisation enthalpies of the lanthanoids are around
A400 kJ/mol
B600 kJ/mol
C900 kJ/mol
D1200 kJ/mol
Answer & Solution
Correct answer: B. 600 kJ/mol
First ionisation enthalpies lie near 600 kJ/mol, while the second are about 1200 kJ/mol.
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