<Tr> <Td> 6 </Td> <Td> 11 </Td> <Td> sodium </Td> <Td> Na </Td> <Td> 28,300 </Td> <Td> 23,000 </Td> <Td> 23,000 </Td> <Td> 27,500 </Td> <Td> 23,600 </Td> <Td> 255,000,000 </Td> </Tr> <Tr> <Td> 7 </Td> <Td> 19 </Td> <Td> potassium </Td> <Td> </Td> <Td> 25,900 </Td> <Td> 21,000 </Td> <Td> 15,000 </Td> <Td> 25,800 </Td> <Td> 20,900 </Td> <Td> </Td> </Tr> <Tr> <Td> 8 </Td> <Td> 12 </Td> <Td> magnesium </Td> <Td> Mg </Td> <Td> 20,900 </Td> <Td> 23,000 </Td> <Td> 29,000 </Td> <Td> 20,800 </Td> <Td> 23,300 </Td> <Td> 1,010,000 </Td> </Tr> <Tr> <Td> 9 </Td> <Td> 22 </Td> <Td> titanium </Td> <Td> Ti </Td> <Td> 4,400 </Td> <Td> 5,600 </Td> <Td> 6,600 </Td> <Td> 6,200 </Td> <Td> 5,600 </Td> <Td> 6,600,000 </Td> </Tr>

Which metal is the most abundant in the earth's crust