Question #f7512

1 Answer
Gaya3
Sep 28, 2017

Germanium

Explanation:

This is Period 4:

Wikipedia

The only two metalloids in period 4 are :-

Germanium...
![https://environmentalchemistry.com/yogi/periodic/Ge.html](useruploads.socratic.org)
and Arsenic...
enter image source here

As you can see, valence electrons in Germanium : 4
Valence electrons in Arsenic: 5

So the element you need is Germanium.

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