You shined a flashlight through water, and then shined it through water made cloudy with milk. How did the milk change how the light behaved? Tell at least two things which you observed.

the answer to this question is 3.

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.