When Mendeleev published his periodic table, there were some spaces for undiscovered elements. Figure 15-1 is a section of a similar table. A reasonable value for the atomic mass of the missing element is ____. picture shown here:
http://prntscr.com/z1z2k
01
72.3
68.2
34.8

Question

When Mendeleev published his periodic table, there were some spaces for undiscovered elements. Figure 15-1 is a section of a similar table. A reasonable value for the atomic mass of the missing element is ____. picture shown here: 
http://prntscr.com/z1z2k
01
72.3
68.2
34.8

anonymous · Answer

opps here 
101
72.3
68.2
34.8

thomaster · Answer

Well obviously something between 69.7 and 74.9

thomaster · Answer

The missing element is Germanium. It has a mass of 72.63