Element X has a very low first ionization energy and a fairly low second ionization energy. However, its third ionization energy is very high. This element is likely a member of what group

all eukaryotic cell have mitochondria : )

the answer is c.the valence of the atoms combine .

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.