Answer:
I think its the first one
Explanation:
Answer:
Two slender woolen sweaters are hotter than a thick woolen sweater in light of the fact that there is a layer of air between them that doesn't permit our body warmth to get away yet it likewise it doesn't retains heat from the climate and fleece is additionally a protector that itself doesn't permit our body warmth to get away

. Iron is divalent to hydrogen and water.
The properties of a compound are different than the properties of the element that forms it
Answer:
it denotes 6.52× 10⁸ in scientific notation