3. Kevin has an unknown element. He wants to find out whether it is a metal or
a non-metal. He heats the substance on one end and the other end gets hot very
quickly. The element is orange in colour and its surface is shiny.
a. Do you think it is a metal or a non-metal?
b. What piece of evidence from the above given information made you decide this?
Explain with respect to the properties of metals and non-metals.