What is germanium?

Germanium is an element on the Periodic Table of Elements, discovered by Germany. Its symbol is Ge, atomic number is 32, its atomic mass is 72.92 (cf. note 1), it is a metalloid, and it is located in Group 14 and period 4. (That means that it has 2 electron shells, and 4 valence electrons in the outer shell. cf. note 2)

Added:

note 1:

According to my tables the atomic mass ranges more or less from 72.64 (Wikipedia.org) to 72.59 g/mol (by discoverer Winkler and in the general high school tables), older records are lower (72.32 or 72.3) but never found this higher value of 72.92 g/mol.

note 2:

In period '4' means that there are 4 shells fully or partially filled: electron configuration (K,L,M,N) is 2, 8, 18, 4