Please hurry I’m taking exams! Will mark brainliest!

The theories on the origin of the universe__

will become laws if they do not change

may change because of new investigations

will weaken scientific knowledge if they change

cannot change because of new discoveries

okay

Explanation:

that is fine

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.