Question

which of the following shows three elements in order of increasing conductivity?
ge, o, mn
o, ge, mn
mn, o, ge
mn, ge, o

Explanation:

Step1: Recall conductivity properties

Conductivity is high in metals, moderate in semimetals (metalloids) and low in non - metals. Mn (manganese) is a metal, Ge (germanium) is a metalloid and O (oxygen) is a non - metal.

Step2: Arrange by conductivity

Non - metals have the lowest conductivity, followed by metalloids and then metals. So, the order of increasing conductivity is O (non - metal), Ge (metalloid), Mn (metal).

Answer:

O, Ge, Mn