Why would alchemy and cold fusion be comparable?

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

According to each substances heat of fusion, which of the items below requires more heat to be added per gram of substance to go from solid to liquid? silver sulfur water lead

If two atoms are bonded to a central atom with no lone pairs, how will they be arranged