You are in a relationship with someone, and the other trusted person is hanging out with some other girl/guy, this is called?

it is b that is the answer.

here are some of the ways in which chemical and nuclear reactions differ.

explanation:

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.