There are two elements that are liquid at the temperature technically designated 'room temperature' or 298 K (25° C) and a total of six elements that can be liquids at actual room temperatures and pressures.
Liquid at 25°C
Become Liquid 25°C-40°C
Most non-metals are not shiny
No metalloid is a gas at room temperature.
non metals are mostly liquid.
Most non-metals are a dull.
Most metalloids are solid at room temperature.
You should google the properties of non-metals...also just look at a picture periodic table, http://www.joeydevilla.com/2006/09/21/google-image-search-periodic-table/ the one at that website is pretty good. This will help you answer the first two questions. Now look up the properties of metalloids.