Check
What kind of energy can be transferred?
energy

kinetic energy can be transferred by hitting a object with potential energy with an object that has kinetic energy, kinda like when u hit bowling pins with a blowing ball.  also thermal energy can be transferred like when use a lighter to burn paper.

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.