A yellow powder from underground mines is more likely to be a nonmetal, such as sulfur. Metal ores typically do not occur as yellow powders but instead as metallic-looking ores.
Nonmetal
The yellow powder you are referring to is likely sulfur. Sulfur is a naturally occurring element that can be found in various forms, including a yellow powder. When sulfur is exposed to air, it can react with oxygen to form sulfur dioxide, which has a pungent smell often described as similar to rotten eggs. This reaction is a common occurrence with sulfur-containing compounds and is responsible for the characteristic odor associated with them.
Sulpher / Sulfer (S)
a nonmetal because a metal is shiny and strong so a nonmetal is brittle and dull
Fluorine is a nonmetal. It belongs to the halogen group in the periodic table, which consists of highly reactive nonmetallic elements.
Nonmetal
Nonmetal
Sulfur is a nonmetal that exists as a yellow powdery solid at room temperature. It is commonly found in its elemental form in nature and has various industrial applications, including in the production of sulfuric acid and fertilizers.
Amorfous sulfur is a yellow powder, this is nothing like metal, so sulfur is a nonmetal (the same as e.g. carbon)
The yellow powder you are referring to is likely sulfur. Sulfur is a naturally occurring element that can be found in various forms, including a yellow powder. When sulfur is exposed to air, it can react with oxygen to form sulfur dioxide, which has a pungent smell often described as similar to rotten eggs. This reaction is a common occurrence with sulfur-containing compounds and is responsible for the characteristic odor associated with them.
Sulpher / Sulfer (S)
Sulfur powder is typically bright yellow in color.
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Sulfur
a nonmetal because a metal is shiny and strong so a nonmetal is brittle and dull
There are many. Sulfur may be the most common.
Fluorine is a nonmetal. It belongs to the halogen group in the periodic table, which consists of highly reactive nonmetallic elements.