electrons in metal play a role of conducting current or signals...
A conductor. These are mostly metals
In metals, the conduction of heat is due mainly to the movement of electrons.
the question makes no obvious sense, but it is a characteristic of all metals that they are good conductors of electricity.
yes. It conducts heat just like other substances, but not as well as metals.
I cannot see the list of substances in which you are referring to.
metals conduct electricity.
A conductor. These are mostly metals
All.
Most metals.
Silver
Metal conducts electricity.
iron, copper, metals in general gases not so much
This element is a metalloid as it has properties (dull but conducts electrical current) from both metals and non-metals.
Neurons use electrochemical signals to send any kind of information through the body.
Conducts heat and electricity very poorly.
I believe you ment to say 'which element conducts electricity Cadmium or Sodium?'They both do. They are both metals.
Carbon is a semi-metallic element and because of this it shares properties of metals and non-metals.