Question

↵which are the elements which are neither metals nor non metals?

Answer 1

Helium is the ANSWER. ...

Answer 2

Metalloids are elements which are neither metals nor non-metals.

Explanation:

These are the elements which have the characteristics of the metals as well as the properties of the non-metals. The examples of these types of elements are boron, silicon, germanium and arsenic etc. One of the most important feature of these metalloids is the conductivity of the metalloids will increase if the temperature will increase. They are called  as semi-conductor elements.