Question

Which of the following are properties of metalloids ?
This question has multiple correct options
A. Lustre
B. Brittle
C. Electronegativity value is near 2
D. Can form alloy
E. Amorphous

Answer 1

Hint: There are very few metalloids other than metals or non-metals. Properties of metalloids are similar to both metals and non metal.

Complete step by step answer:
-The metalloids have mostly the characteristics of Nonmetals. Therefore they can easily form alloys with metals.
Alloys formed by silicon with iron and with aluminium are widely used by the steel and automotive industries. Germanium generally forms many alloys with the coinage metals. Arsenic can form alloys with platinum and copper, it also improves the corrosion resistance of Cu. Antimony is well known for forming alloy. It has an alloy named pewter (a tin alloy with up to 20% antimony) and type metal (a lead alloy with up to 25% antimony.
Metalloids have a metallic lustre. Metalloids have low elasticity, they are very brittle. The word brittle stands for the elements that are hard but easily can be broken.
They have an appearance like the metals and they can conduct electricity too. Silicon and germanium are the basic elements to form modern day semiconductor. It generally doped with pentavalent or trivalent elements to improves it capacity of conducting electricity
They are amorphous and they have electronegativity closer to the value of 2. Electronegativity of Ge is 2.01 and that of As is 2.18 So, the correct answer is “Option A,B,C, D”.

Note: Although metalloids have properties like non metals but they are not generally amorphous. Also unlike metals, With increase in temperature the conductivity of non metals increases.