A student places a chemical in an insulated container and measures the temperature. A second chemical is added and the container is sealed and the temperature is monitored. What is the student trying to determine?
What color changes can be observed?
How much precipitate is formed?
Is heat absorbed or released?
O How can this reaction be reversed?

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.