6 Na(s) + Al2(SO4)3(aq) + 3 Na2SO4(aq) + 2 Al(s) If 2.4 moles of aluminum sulfate react with 2.8 moles of sodium, calculate
the number of moles of sodium sulfate that will be produced by the
limiting reactant.​

the answer is barium and copper bromide

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.