## Neutron number |

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The **neutron number**, symbol * N*, is the number of

* Z* +

Neutron number is rarely written explicitly in nuclide symbol notation, but appears as a

Element | |

Isotope/Nuclide | |

With atomic number |

Nuclides that have the same neutron number but a different proton number are called **p** in **n** for neutron. Nuclides that have the same mass number are called ^{[1]}

Chemical properties are primarily determined by proton number, which determines which

Neutron number is primarily of interest for nuclear properties. For example,

Only 58 stable have an odd neutron number, compared to 194 with an even neutron number. No odd-neutron-number isotope is the

No stable nuclides have neutron number 19, 21, 35, 39, 45, 61, 89, 115, 123, and ≥ 127. There are 6 stable nuclides and one radioactive ^{36}S, ^{37}Cl, ^{38}Ar, ^{39}K, and ^{40}Ca, and in the case for 50, there are 5 stable nuclides: ^{86}Kr, ^{88}Sr, ^{89}Y, ^{90}Zr, and ^{92}Mo, and 1 radioactive primordial nuclide, ^{87}Rb). All odd neutron numbers have at most one stable isotope (except 1 (^{2}H and ^{3}He), 5 (^{9}Be and ^{10}B), 7 (^{13}C and ^{14}N), 55 (^{97}Mo and ^{99}Ru) and 107 (^{179}Hf and ^{180m}Ta). However, some even neutron numbers also have only one stable isotope; these numbers are 2 (^{4}He), 4 (^{7}Li), 84 (^{142}Ce), 86 (^{146}Nd) and 126 (^{208}Pb).^{[2]}

Only two stable nuclides have fewer neutrons than protons:

- references

**^**Teh Fu Yen,*Chemistry for Engineers*(Imperial College Press, 2008), p.265**^**Audi, G.; Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S. (2017). "The NUBASE2016 evaluation of nuclear properties" (PDF).*Chinese Physics C*.**41**(3): 030001.2017ChPhC..41c0001A .10.1088/1674-1137/41/3/030001 .

Other Languages

العربية: عدد النيوترونات

català: Nombre neutrònic

čeština: Neutronové číslo

Deutsch: Neutronenzahl

español: Número neutrónico

فارسی: عدد نوترون

français: Nombre de neutrons

hrvatski: Neutronski broj

Bahasa Indonesia: Jumlah neutron

italiano: Numero neutronico

ქართული: ნეიტრონული რიცხვი

norsk: Nøytrontall

polski: Liczba neutronowa

ไทย: เลขนิวตรอน

Tiếng Việt: Số nơtron

中文: 中子數