Md
Mendelevium
العنصر 101 · 258.09843 u
Mendelevium was the first element produced one atom at a time.
Physical Properties
| الكتلة الذرية | 258.09843 u |
| الكثافة | 10.3 g/cm³ |
| Melting Point | 1100.0 K |
| المظهر | Metallic (predicted) |
| State at Room Temp | Solid |
الخواص الكيميائية
| السالبية الكهربائية | 1.3 (Pauling) |
| طاقة التأين الأولى | 635.0 kJ/mol |
| القرب الإلكتروني | -93.91 kJ/mol |
| Oxidation States | +2, +3 |
الخصائص الذرية
| تشكيل الإلكترون | [Rn] 5f13 7s2 |
اكتشاف
| اكتشفها | Albert Ghiorso, Bernard G. Harvey, Gregory R. Choppin, Stanley G. Thompson, Glenn T. Seaborg |
| سنة الاكتشاف | 1955 |
| الموقع | Berkeley, California, USA |
| Named After | Named after Dmitri Mendeleev, creator of the periodic table |
عن Mendelevium
Mendelevium was created by bombarding einsteinium with alpha particles. The initial experiment produced only 17 atoms.
Uses & Applications
No practical applications. Scientific research only.
حقيقة مضحكة
Mendelevium was the first element identified one atom at a time -- only 17 atoms were initially produced.
النظائر
| Mass Number | الوفرة | نصف العمر | Stable |
| 258 | - | 51.5 days | No |
| 260 | - | 27.8 days | No |
تشكيل الإلكترون
[Rn] 5f13 7s2