Which of these statements is true about heating up air in the lower atmosphere? It occurs mainly through radiant energy.
It occurs through convection from Earth.
It happens to a different extent over land and water.
It takes place through conduction between the sun and air.

b.

the accuracy of the data.

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.