<Li> 2nd: 1980 kJ / mol </Li> <Tr> <Th> Atomic radius </Th> <Td> empirical: 144 pm </Td> </Tr> <Tr> <Th> Covalent radius </Th> <Td> 136 ± 6 pm </Td> </Tr> <Tr> <Th> Van der Waals radius </Th> <Td> 166 pm </Td> </Tr>

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