The first ionization energy of element Q is 1620 kJ mol-1. The first ionization energy of element R is 419 kJ mol-1.
Both elements are in the same group.

Which element has the largest radius? Explain using the relationship between the atomic radius and ionization energy.

Which element is in a higher period? Explain.

if you're asking what comes out, it's steam.

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.