<Tr> <Td> 28 </Td> <Td> 60 </Td> <Td> neodymium </Td> <Td> Nd </Td> <Td> </Td> <Td> 38 </Td> <Td> 33 </Td> <Td> </Td> <Td> 41.5 </Td> <Td> </Td> </Tr> <Tr> <Td> 29 </Td> <Td> 57 </Td> <Td> lanthanum </Td> <Td> La </Td> <Td> </Td> <Td> 32 </Td> <Td> 34 </Td> <Td> </Td> <Td> 39 </Td> <Td> </Td> </Tr> <Tr> <Td> 30 </Td> <Td> 39 </Td> <Td> yttrium </Td> <Td> Y </Td> <Td> </Td> <Td> 30 </Td> <Td> 29 </Td> <Td> </Td> <Td> 33 </Td> <Td> 6,000 </Td> </Tr> <Tr> <Td> 31 </Td> <Td> 7 </Td> <Td> nitrogen </Td> <Td> </Td> <Td> 50 </Td> <Td> 25 </Td> <Td> 20 </Td> <Td> </Td> <Td> 19 </Td> <Td> 140,000,000 </Td> </Tr>

What is the second most abundant metal in the earth's crust