Equation 2 · Part 1 · The Valley of Stability Is a Fitness Landscape
Symbol Z
What this part means
the proton number.
Its job in the formula
Z is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol Z→Article meaning
Where the article explains it
Each point is a pair of integers, a proton number Z and a neutron number N , and at each occupied point sits one nuclear species with a measured or estimated mass.
The passage around this formula
That chart is a discrete space. Each point is a pair of integers, a proton number Z and a neutron number N , and at each occupied point sits one nuclear species with a measured or estimated mass. The 2020 evaluation of nuclear structure and decay properties, NUBASE2020, lists recommended ground-state properties for 3,340 nuclides, plus a further 1,938 excited isomeric states,…
Learn the underlying idea
A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.
Open the illustrated variables: a letter stands for a value guide →
See this notation across published equations →
Sources cited in the surrounding passage
- [2] The NUBASE2020 evaluation of nuclear physics properties ↗
- [3] The limits of the nuclear landscape ↗
These citations provide research context; check each source for the exact claim it supports.