The answer 1) Oxygen. And another smallest radius is fluorine, because it is the first in the periodic table.
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If I am correct, yes. As I was told in chemistry, the surface area affects the dissolving of the "sugar". If you put regular Surat in a hot cup of coffee, it will dissolve at a quick pace, but what if you put the same amount of sugar in the same amour of coffee, but the sugar was fine powder? It would dissolve even faster since it has more surface area. So temperature does affect the dissolving. Hope this helps!
Melted rock and minerals below the earth's crust is also known as magma
