No
Actinide
Nobelium
Z 102A 259mass 259
Atomic model
tap a particleEvery nucleon is drawn individually — 102 protons and 157 neutrons packed into the nucleus, with 102 electrons on shells outside.
102+1
Protons
Set the element — change this and it becomes a different atom.
1570
Neutrons
Change only these and you get a different isotope of the same element.
102−1
Electrons
Sit outside the nucleus and decide the chemistry, not the element.
Element data
- Nucleons
- 259 (102 p + 157 n)
- Electron shells
- 2 · 8 · 18 · 32 · 32 · 8 · 2
- Valence shell
- 2 electrons
- Atomic mass
- 259 u
Stability
Nobelium has no measured radioactive isotope in this lab — its nuclei are stable, so decay must be shown as an illustration.
Open the decay lab