Which substance would retain the most heat for the longest period of time?

Specific heat is defined as the amount of heat one gram of a substance must absorb or lose to change its temperature by one degree Celsius.

Explanation:

but capacity heats of material can be hold another unit  and either materials  (volume , mass)  somethings like how ,capacity heat compare to the materials or can be molybdenum ,or but the better  insulations or any heat  energy and also take a long time to heats up of materials

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

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