Gold is a valuable metal that has an atomic number of 79. Dating back nearly 5,500 years, different civilizations used gold in jewelry and artwork. These early civilizations also used gold as money.Know More
In nature, many compounds, such as tellurium, calcite and quartz, contain gold. Gold also can occur freely in nature. It is a malleable, shiny and soft metal that has the chemical symbol Au. Malleable means that it is easy to hammer or beat gold into thin sheets or thin wire.
Some other physical properties of gold are that it is a conductor of electricity and heat, and it has a melting point of 1064.18 degrees Celsius. It also has good reflectivity properties.
Presently, gold has many uses, including for jewelry, electrical contacts, printed circuits, shielding on space vehicles and dental alloys.Learn more about Atoms & Molecules
Gold is expensive because there are limited quantities available. In addition, it is expensive to produce, which also drives up the overall cost.Full Answer >
Gold is a solid at room temperature. It does not melt until it reaches 1,064.18 degrees Celsius, which is 1,947.52 degrees Fahrenheit. Its boiling point is 2,856 degrees Celsius or 5,173 degrees Fahrenheit.Full Answer >
Sodium is a metallic element on the periodic table with an atomic number of 11 and an atomic mass of 22.98 amu. This atomic mass is calculated by adding together the number of protons and neutrons present in the atom's nucleus. Sodium was discovered by Sir Humphrey Davy in 1807.Full Answer >
Element 115 is ununpentium, which is an element that has the atomic number 115 on the periodic table. It is an extremely rare and unusually heavy element that was added to the periodic table in 2013.Full Answer >