What are the three main groups used to classify elements on the periodic table?, Which group of elements is known for being shiny, hard, and excellent conductors of electricity?, Which group of elements naturally lacks the ability to conduct electricity and heat well?, What do we call elements that share properties of both metals and non-metals?, What property allows a metal to be beaten or rolled into thin sheets without breaking?, What property allows a metal to be drawn out or stretched into long, thin wires?, Why are non-metals often referred to as electrical insulators?, Which classification does Copper belong to?, Which classification does Oxygen belong to?, Question: Which classification does Silicon belong to?, Which unique metal exists as a liquid at room temperature?, Is Gold classified as a metal, non-metal, or metalloid?, Is Helium classified as a metal, non-metal, or metalloid?, If an element shatters into pieces when hit with a hammer, is it likely a metal or a solid non-metal?, On which side of the periodic table are most metals located?, On which side of the periodic table are most non-metals found?, Why are metalloids also called "semiconductors"?, Which classification do Nitrogen and Helium share?, Which classification do Arsenic and Antimony share?, Question: Why is Iron categorized as a metal?

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