Thanks to Yinon Bentor for his work at

Periodic Table with Neutrons at Chemical Elements.com

Number of Neutrons for the Most Abundant Isotope


Back to Main Page

  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
1 H He
0 2
2 Li Be B C N O F Ne
4 5 6 6 7 8 10 10
3 Na Mg Al Si P S Cl Ar
12 12 14 14 16 16 18 22
4 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
20 20 24 26 28 28 30 30 32 31 35 35 39 41 42 45 45 48
5 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
48 50 50 51 52 54 55 57 58 60 61 64 66 69 71 76 74 77
6 Cs Ba * Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
78 81 106 108 110 111 114 115 117 118 121 123 125 126 125 125 136
7 Fr Ra ** Rf Db Sg Bh Hs Mt Uun Uuu Uub
136 138 157 157 157 155 157 157 159 161 165
* La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
82 82 82 84 84 88 89 93 94 97 98 99 100 103 104
** Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr
138 142 140 146 144 150 148 151 150 153 153 157 157 157 159

Element Groups (Families)

Alkali Earth Alkaline Earth Transition Metals
Rare Earth Other Metals Metalloids
Non-Metals Halogens Noble Gases
Z element A        
1 Hydrogen 1 1      
2 Helium 4 4      
8 Oxygen 16 4 12    
10 Neon 20 4 4 12  
6 Carbon 12 4 8    
7 Nitrogen 14 4 6 4  
14 Silicon 28 4 4 20  
12 Magnesium 24 4 20    
26