Gd
Lanthanide
Gadolinium
Z 64A 157mass 157.25
Atomic model
tap a particleEvery nucleon is drawn individually — 64 protons and 93 neutrons packed into the nucleus, with 64 electrons on shells outside.
64+1
Protons
Set the element — change this and it becomes a different atom.
930
Neutrons
Change only these and you get a different isotope of the same element.
64−1
Electrons
Sit outside the nucleus and decide the chemistry, not the element.
Element data
- Nucleons
- 157 (64 p + 93 n)
- Electron shells
- 2 · 8 · 18 · 26 · 8 · 2
- Valence shell
- 2 electrons
- Atomic mass
- 157.25 u
Stability
Gadolinium has no measured radioactive isotope in this lab — its nuclei are stable, so decay must be shown as an illustration.
Open the decay lab