metals
Non-metals are dull (or they are not shiny as metals).
A yellow brittle solid is most likely a non-metal. Metals are typically solid at room temperature, but they are usually malleable and ductile, rather than brittle. Non-metals, on the other hand, can be brittle in nature.
My opinion would be metal. Since non metals are brittle and dull, I disagree with the non-metals.
Almost all of the non-metals are brittle when solid. For example, sulfur.
Brittle is neither a metal or nonmetal, it is a physical property of materials.Brittle is a property of a material. Most metals are not brittle but ductile and maleable.
metals
Yes, brittleness is a physical property of some metals. Brittle metals tend to fracture or break without significant deformation when subjected to stress. This is in contrast to ductile metals that can be bent or stretched without breaking.
Cast iron, is one example of a non-ductile metal. Unlike ductile metals, copper, steel, aluminium - cast iron is too brittle to be reworked.
Yes, bismuth is considered a metalloid. It has properties of both metals and non-metals, such as being brittle like a metal but also having some semiconducting characteristics like a non-metal.
Boron is a metalloid, which means it has properties of both metals and non-metals. It displays characteristics of both categories, such as being a good conductor of electricity but also brittle and lacking luster like non-metals.
Silicon is a metalloid, which is a mix between metal and a non-metal.
Some characteristics of non-metals are that they are poor conductors of electricity and heat, brittle, and have high electronegativities. On the Periodic Table, examples of non-metals are nitrogen, carbon, the halogens, and sulfur.