What are metalloids ?

a] What are metalloids? Write any two examples. b] Given below are some of the elements of the first group: Li, Na, K (their atomic numbers are 3, 11, and 19 respectively and they belong to 2nd, 3rd, and 4th period respectively). Arrange them in the decreasing order of their metallic character.

Which of the following is a ( are ) metalloid(s) ?

Metalloids is

What is metalloid ?

Why are metalloids called semimetals?