transition metals allow heat and electricity to pass through them what substances like this knows as?

Ineed pls urgent 1-20 in order and fully detail step my step.

Which method would be best to separate a mixture of sand and gravel

An unknown substance has been shown to have metallic bonds. which of the following is most likely a property of this substance? a. low conductivity b. low boiling point c. high malleability d. high solubility in water