Rg
Roentgenium
العنصر 111 · 282.169 u
خصائص غير معروفة
قطاع د
Period 7
المجموعة 11
Unknown at RT
Radioactive
t½ 100 seconds
Synthetic
Wikipedia →
Roentgenium may be the most electronegative metal due to relativistic effects.
Physical Properties
| الكتلة الذرية | 282.169 u |
| الكثافة | 28.7 g/cm³ |
| المظهر | Metallic (predicted) |
| State at Room Temp | Unknown |
الخواص الكيميائية
| Oxidation States | +1, +3, +5 |
الخصائص الذرية
| تشكيل الإلكترون | [Rn] 5f14 6d9 7s2 |
اكتشاف
| اكتشفها | Peter Armbruster, Gottfried Munzenberg and others |
| سنة الاكتشاف | 1994 |
| الموقع | Darmstadt, Germany |
| Named After | Named after Wilhelm Conrad Rontgen, discoverer of X-rays |
عن Roentgenium
Roentgenium is a synthetic, extremely radioactive element expected to be similar to gold. Relativistic effects significantly influence its predicted properties.
Uses & Applications
No practical applications. Scientific research only.
حقيقة مضحكة
Roentgenium is predicted to be the most electronegative metal due to relativistic effects on its electron orbitals.
النظائر
| Mass Number | الوفرة | نصف العمر | Stable |
| 280 | - | 3.6 seconds | No |
| 282 | - | 100 seconds | No |
تشكيل الإلكترون
[Rn] 5f14 6d9 7s2