Au
Gold is a precious metal prized for its beauty, rarity, and resistance to corrosion.
Physical Properties
| الكتلة الذرية | 196.97 u |
| الكثافة | 19.282 g/cm³ |
| Melting Point | 1337.33 K |
| نقطة الغليان | 3129.0 K |
| المظهر | Metallic yellow |
| State at Room Temp | Solid |
الخواص الكيميائية
| السالبية الكهربائية | 2.54 (Pauling) |
| طاقة التأين الأولى | 890.1 kJ/mol |
| القرب الإلكتروني | 222.8 kJ/mol |
| Oxidation States | +1, +2, +3, +5 |
الخصائص الذرية
| تشكيل الإلكترون | [Xe] 4f14 5d10 6s1 |
| نصف قطر الذرة | 144.0 pm |
| نصف قطر التكافؤ | 136.0 pm |
| Van der Waals Radius | 166.0 pm |
اكتشاف
| اكتشفها | Known since antiquity |
| الموقع | Various (Middle East) |
| Named After | Anglo-Saxon 'geolo' meaning yellow; symbol Au from Latin 'aurum' |
عن Gold
Gold is a bright, slightly orange-yellow, dense, soft, malleable, and ductile metal. It is one of the least reactive elements. A single ounce can be beaten into a 300 square foot sheet. It has symbolized wealth throughout human history.
Uses & Applications
Jewelry, currency, electronics, dental work, aerospace shielding, and medical treatments.
حقيقة مضحكة
A single ounce of gold can be beaten into a 300 square foot sheet or drawn into a 50-mile wire -- the most malleable of all metals.
النظائر
| Mass Number | الوفرة | نصف العمر | Stable |
| 197 | 1.0% | - | Yes |
تشكيل الإلكترون
[Xe] 4f14 5d10 6s1