Question

which element is brittle and does not conduct heat or electricity?
o b
o mg
o al
o k

Explanation:

• B (Boron): Boron is a non - metal. Non - metals are generally poor conductors of heat and electricity.
• Mg (Magnesium): Magnesium is a metal. Metals are good conductors of heat and electricity due to the presence of free electrons.
• Al (Aluminium): Aluminium is a metal. It has a high electrical and thermal conductivity.
• K (Potassium): Potassium is a metal. Metals have the property of conducting heat and electricity.

Answer:

B. B