Element 102
Nobelium
Actinides
Nobelium (No) is in the f-block of the periodic table — group 3, period 7.
Nobelium is a synthetic chemical element with symbol No and atomic number 102.
Key data
- Atomic number
- 102
- Atomic mass
- 259.000 u
- Group / Period
- 3 / 7
- Block
- f-block
- Phase at STP
- Solid
- Density
- —
- Melting point
- 826.9 °C
- Boiling point
- —
- Electron configuration
- [Rn] 5f14 7s2
Periodic table block
Nobelium is in the f-block (group 3, period 7). Elements land in the f-block when their highest-energy electrons fill an f subshell — these are the lanthanides and actinides shown beneath the main table.
New to this? Periodic table blocks explained: s, p, d, and f
Common uses
- •Research only
- •Synthesized in 1958
- •Named after Alfred Nobel
Discovery
Year: 1958
Discovered by: Joint Institute for Nuclear Research
Frequently asked questions
What is the atomic number of Nobelium?
Nobelium has atomic number 102. Its symbol is No and its atomic mass is 259 u.
What category of element is Nobelium?
Nobelium is classified as actinides. It sits in group 3, period 7 of the periodic table.
What block of the periodic table is Nobelium in?
Nobelium is in the f-block (group 3, period 7). Its highest-energy electrons occupy the f subshell — you can see this in its electron configuration, [Rn] 5f14 7s2.
What is Nobelium used for?
Common uses of Nobelium include: Research only, Synthesized in 1958, Named after Alfred Nobel.
When was Nobelium discovered?
Nobelium was discovered in 1958 by Joint Institute for Nuclear Research.
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