Match the items of Column I with the corresponding items of Column Il. Column 1 1. Building materials, tools and vehicles. 2 Water pipes and electric cables. 3. In coins and catalyst in the manufacture of margarine, 4. Jewelry and plating of teeth. 5. Artificial hip joints, pipes in nuclear power stations. 6. Galvanization of steel. Column 1 a. Copper b. Iron C. Zinc d. Nickel e. Titanium f. Gold g. Silver h. Mercury​

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.