Out of the following two, which one's the metalloid?
Element A: slight luster, high conductivity, bubbles slowly when reacted with HCl
Element B: shiny, low conductivity, no reaction when reacted with HCl
Most sources that I have found say that metalloid characteristics are between metals and nonmetals, but both elements seem to fit somewhere in between metals and nonmetals, so how do you tell which one is the metalloid?