Guy plzz help me the this and thanks

Explanation:

In first picture,

When rock was not in the cylinder,

Volume of water

In second picture,

When rock is in the cylinder,

Volume of water

Hence,

Volume of rock

give me abc and i will get it for u.

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.