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 the 79th element on the periodic table and has a relative atomic mass of 196.967. Gold, which has a chemical symbol of Au, is a shiny, valuable metal that was first discovered more than 5,500 years ago.Full Answer >
The atomic number of an atom represents the number of protons found in the nucleus of that atom. Elements are identified by their atomic numbers because each element has a different number of protons in its nucleus.Full Answer >
A nonmetal element in chemistry is an element that does not possess the properties of metals, and is found in the groups 14, 15 and 16 of the periodic table. Unlike metals, nonmetals are poor conductors and typically have more than four valence electrons.Full Answer >
When a nucleus emits a positron, its atomic number is lowered by one but its mass number stays the same. Positron emission is also known as positive beta decay and involves the decay of a proton into a neutron.Full Answer >