<Tr> <Td> 50 </Td> <Td> 63 </Td> <Td> europium </Td> <Td> Eu </Td> <Td> </Td> <Td> 2.1 </Td> <Td> 1.8 </Td> <Td> </Td> <Td> 2.0 </Td> <Td> </Td> </Tr> <Tr> <Td> 51 </Td> <Td> 92 </Td> <Td> uranium </Td> <Td> U </Td> <Td> </Td> <Td> 0 </Td> <Td> 1.8 </Td> <Td> </Td> <Td> 2.7 </Td> <Td> 74,119 </Td> </Tr> <Tr> <Td> 52 </Td> <Td> 73 </Td> <Td> tantalum </Td> <Td> Ta </Td> <Td> </Td> <Td> </Td> <Td> 1.7 </Td> <Td> </Td> <Td> 2.0 </Td> <Td> 1,100 </Td> </Tr> <Tr> <Td> 53 </Td> <Td> 32 </Td> <Td> germanium </Td> <Td> Ge </Td> <Td> </Td> <Td> 1.8 </Td> <Td> 1.4 </Td> <Td> </Td> <Td> 1.5 </Td> <Td> 155 </Td> </Tr>

The most abundant element in the earth's crust by weight is