it is white and crystalline. a solid at room temperature.
The appearance of chromium is as a steel.
It is a grey-metallic metal. It is solid at room temperature.
The aspect of rutherfordium is not known.
The fresh surface of plutonium is metallic, silvery.
Nitrous oxide, N2O, is a colorless gas at room temperature.
Bromine is a reddish-brown liquid at room temperature. It is highly volatile, with a strong, sharp odor.
At room temperature radium is a solid metal.
The metal curium is normally a solid at anything close to "normal" temperature. It melts at well in excess of 1000 °C. Curium is a synthetic trans-uranium element; it is not found in nature. A link can be found below.
Mercury is a liquid at room temperature. It's a metal and silvery.
Saturated fats and trans-fats are solid at room temperature. Polyunsaturated and monounsaturated fats (oils) are liquid at room temperature. Trans-fats are liquid fats that are treated chemically and thermally to mimic saturated fats, usually in a process called hydrogenation. This process in a nutshell (it's a bit more complicated) injects hydrogen into the oils at high temperature and high pressure producing polymers (plastics) from the hydrocarbon molecules in the oils. Most vegetable shortenings are produced this way, shortenings (solid fats) that are not natural saturated fats are trans-fats.
Most nonmetals are gases at room temperature, such as oxygen, nitrogen, and fluorine. Some nonmetals, like sulfur and carbon, are solids at room temperature.