Before the Discovery of the Element Germanium in 1886, Its

Before the discovery of the element germanium in 1886, its existence was predicted by Mendeleev as "eka-silicon". Mendeleev not only predicted the existence of this element but also its properties. Use the density of the neighboring elements to estimate the density of Ge.

A) 2.5 g cm^-3
B) 4 g cm^-3
C) 5.5 g cm^-3
D) 7 g cm^-3
E) 9.6 g cm^-3