The density of a concentrated phosphoric acid solution is 1.576 g/ml solution at 20°C. It contains 138.0 g H, PO4 per 1.00E+2ml of solution​

c (diamond),

sio2 (quartz)

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.

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.