Due to expansion of the universe, everything is moving away from everything else. This is especially noticeable at extremely large distances. If a galaxy cluster is observed to be moving away from Earth at a velocity of 45 km/s, how far away is that galaxy cluster? Enter only the number for the answer, assuming that the units is Mly.

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.