Question

A)name one non metal which has metallic lustre?

B)What are coinage metals?

C)why should food stuffs with acids components be not stored in metallic containers?

D)which metals are used for making fine electrical contacts in computers and solar cells?

Answer 1

A. Graphite


B.Coinage metals are part of group of three malleable ductile transition metals forming group 11 of the periodic table copper (Cu), silver (Ag), and gold (Au) which are used for making coins. Their outer electronic configurations have the form nd 10(n+1)s 1. Although this is similar to that of alkali metals, the coinage metals all have much higher ionization energies and higher standard electrode potentials. Thus, they are much more difficult to oxidize and are more resistant to corrosion making them ideal for making coins.

C.because when acid reacts with metals hydrogen gas (H2) is produced and also corrode metal which produces poisonous and hazardous substances

D.silicon and germanium