On a cold morning water vapor in air becomes frost on your window. Is heat flowing into the water or out of the water? Is this process exothermic or endothermic??

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

i think its 100.

hope this !

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