Question

An unknown element has chemical behavior similar to that of silicon (Si) and lead (Pb). The unknown element has a mass greater than that of sulfur (S), but less than that of cadmium (Cd). Use the periodic table to determine the identity of the unknown element.

Answer 1

Ge ( Germanium)

Step-by-step explanation:

The atomic mass of Ge is 72.61 and the atomic mass of S is 32.066 and the mass of Cd is 112.411 so being the only element in the same group as Si.