Among iron, gold, carbon, and silver, the odd member is carbon, the only non-metal of the group. On the periodic table, the three metals are all in the central "transitional metals" area, but carbon is on the right side among the non-metals.
Tin is the odd one out because it is not a metal known for its corrosion resistance. Silver, zinc, gold, and iron are all metals that are commonly used for their corrosion resistance properties.
Iron is the odd one out because it is not an alloy. Brass and bronze are both alloys made by combining copper with other metals, while iron is a pure element.
Sulfur is the odd one out as it is a non-metal, while the others (gold, aluminum, silver, lead) are metals.
Platinum, because Gold And Silver , together with Copper and in the same Sub- Group of the Periodic Table. This means that Gold , Silver and Copper have the same number of electrons in their outmost energy shell.
Iron is the odd entry in this list.
They aren't worthless, but the vast majority of Roman coins are struck in bronze which isn't worth as much as gold or silver, many were struck for circulation and bronze deteriorates with time meaning that many of the coins are not in good condition after being dug up 2,000 some odd years later. All of these affects value.
Iron is the odd one out because it is a metal, while oxygen, carbon, and sulfur are nonmetals.
Glass is the odd one out because it is not a metal, unlike steel, iron, and tin.
bronze ****************************** Mercury, as it is the only metal that is a liquid at room temperature.
Iron is the odd one out because it is a transition metal, while lithium, potassium, and sodium are alkali metals.
Carbon is the odd one out because it is a non-metal, while copper, aluminum, and iron are metals.