Tungsten, gold density 19.2 g cubic centimeter, tungsten 19.3 g cubic centimeter. Followed by tantalum 16.6. Platinum 2 1.5. Iridium 22.45438+0. Osmium is 22.48 grams per square centimeter.

The color of gold is golden yellow, which has a metallic texture and is not easy to decompose. Hardness 2-3, pure gold 19.3, melting point1064.4℃; It has good ductility, can be pressed into thin foil, and has extremely high heat transfer and conductivity. The resistance of pure gold is 2.4p, and it has good chemical resistance, so it is the best electroplating material.

Extended data

Cleaning method

1, in order to protect the luster of gold jewelry, you can coat it with a thin layer of nail polish.

2. If there is a black silver film on the surface, 2 grams of salt, 7 grams of baking soda, 8 grams of bleaching powder and 60 ml of water can be used to prepare a "gold cleaner". Put the gold jewelry in a bowl, pour the detergent, take it out after 2 hours, rinse it with clear water (preferably not hard water), bury it in sawdust to dry, and then wipe it with a soft cloth.

3. Ring inlaid with gemstones Roll a piece of cotton with popsicles or matchsticks, soak it in a mixture of toilet water and glycerin, scrub the gemstone and its frame, and then polish the ring with flannel. Never scratch with sharp objects such as blades.

4, salt and vinegar mixed into a cleaning agent, use it to wipe pure gold jewelry, can make it durable.