102
No
Nobelium
Nobelium
Nobelium (No)
Actinides · Solid · Period 7 · Group 3
Element Properties
- Atomic Number
- 102
- Symbol
- No
- Atomic Mass
- 259.101
- Category
- Actinides
- Standard State
- Solid
- Period
- 7
- Group
- 3
- Electronegativity
- 1.3
- Atomic Radius
- —
- Ionization Energy
- 6.65
- Electron Affinity
- —
- Oxidation States
- +3, +2
- Melting Point
- 1100 K (826.85 °C)
- Boiling Point
- —
- Density
- —
- Electron Configuration
- [Rn]7s2 5f14
- Year Discovered
- 1957
Electron shells
[Rn]7s2 5f14
Electrons are arranged in shells (principal energy levels) around the nucleus. The diagram is a schematic — orbitals in the same shell are not drawn separately.
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Frequently asked questions
What is the atomic number of Nobelium?
The atomic number of Nobelium is 102, which equals the number of protons in its nucleus.
What is the atomic mass of Nobelium?
The atomic mass of Nobelium is approximately 259.101 u (one twelfth of the mass of a carbon-12 atom).
What is the electron configuration of Nobelium?
The electron configuration of Nobelium is [Rn]7s2 5f14.
Where is Nobelium in the periodic table?
Nobelium is located in period 7, group 3.
When was Nobelium discovered?
Nobelium was discovered in 1957.
Related elements
Same group
21
Sc
Scandium
44.956
39
Y
Yttrium
88.906
57
La
Lanthanum
138.905
58
Ce
Cerium
140.116
59
Pr
Praseodymium
140.908
60
Nd
Neodymium
144.24