Metals are good conductors of heat because: (1) They contain large number of free electrons (2) Their aloms are relatively apart (3) Their atoms collide frequently (4) They have reflecting surface

Answer: (1)

Metals are an excellent electricity and heat conductor because the metal atoms form a matrix through which the outer electrons can move freely. Instead of orbiting their respective atoms they form a sea of electrons surrounding the positive nuclei of the metal ions that interact. The electrons then move freely across the sea of electrons.

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