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.Continue Reading
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
Fluorine is a nonmetal that belongs to the family of elements called halogens. The symbol of fluorine is F, and its atomic weight is 18.9984032 atomic mass units or grams per mole.Full Answer >
Silicon is a metalloid, a semimetallic element that is neither a metal nor a nonmetal but has some of the properties or characteristics of the two. A semi-metal in the periodic table, silicon is one of the elements that can't be found in nature in its elemental form. It is also one of the most common elements in nature, accounting for about 28 percent of the earth's crust by mass.Full Answer >
Magnesium is classified as an alkaline earth metal. Metals are defined as elements that can be hammered into sheets (malleable), made into a wire (ductile) and are good conductors of electricity and heat.Full Answer >
An ionic bond is formed between an active metal and a nonmetal. The electrons are not shared between the two atoms; instead, the electrons transfer from the metal to the nonmetal.Full Answer >