what are the four types of coal found in the USA ? and make sure you list them from younger to oldest.

4 types of coal from oldest to youngest: anthracite, bituminous, subbituminous, and lignite

answer carbon and three oxygen atoms;

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.