A resource that humans know about but cannot reach or use at this time is known as which of the following types of resources

potential resource

Explanation:I took the quiz

Also It is potential because it may not be a resource now but once we get the technology to gain this it could become a usable resource

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.