<Tr> <Td> 5 </Td> <Td> Boron </Td> <Td> 2, 3 </Td> <Td> 13 </Td> </Tr> <Tr> <Td> 6 </Td> <Td> Carbon </Td> <Td> 2, 4 </Td> <Td> 14 </Td> </Tr> <Tr> <Td> 7 </Td> <Td> Nitrogen </Td> <Td> 2, 5 </Td> <Td> 15 </Td> </Tr> <Tr> <Td> 8 </Td> <Td> Oxygen </Td> <Td> 2, 6 </Td> <Td> 16 </Td> </Tr>

Hat are the values of 'n' for the shells k l and m