Au 金
Not only for decoration, but also for your mobile phone or smartphone.
Connecting electricity as ultra-fine wires
A multi-talented person who plays an important role.
In vitro diagnostic kits
Detection principle and detection examples
Gold turns red when it becomes colloidal (nanometer-sized particles). In recent years, diagnostic kits utilizing this property have been used in medical settings.
Gold nanocolloids are used in "in vitro diagnostic kits" (using the immunochromatography method*1) that enable quick and easy early detection of diseases such as influenza, pregnancy, allergen detection, and some cancers.
*1 Immunochromatography method: A method that uses capillary phenomena occurring in porous materials and allows the presence or absence of antigens in a specimen (such as blood) to be visually checked easily and in a short time.
Precious Metal Element Data
| Atomic Number | 79 |
|---|---|
| atomic weight | 196.966569 |
| Stable Isotope | 197Au |
| crystal structure | fcc |
| Metallic | Trans.Metal |
| Shell structure | 2,8,18,32,18,1 |
| Occupied Orbit | 5d10 |
| Oxidation state | 3,1 |
| Atomic radius | 1.44 |
| Shared bond radius | 1.34 |
| Atomic capacitance | 10.2 |
| Density (293K) | 19.32 |
| Melting point | 1064.18 |
| Boiling Point | 2857 |
| Specific heat | 0.128 |
| melting heat | 12.55 |
| heat of vaporization | 334.40 |
| Thermal conductivity (273K) | 319 |
| Electrical resistivity (273K) | 2.05 |
| Linear thermal expansion coefficient (293K) | 14.2 |
| First ionization potential | 9.22553 |
| Second ionization potential | 20.20 |
| Electron Affinity | 2.30863 |
| Electronegativity | 2.4 |
| Year of Discovery | Ancient |
