n  1 (1)
H  1-6 (6)
He 3-10 (8)
Li 4-12 (9)
Be 5-14 (10)
B  7-19 (13)
C  8-22 (15)
N  10-24 (15)
O  12-26 (15)
F  14-29 (16)
Ne 16-32 (17)
Na 18-35 (18)
Mg 20-38 (19)
Al 21-41 (21)
Si 22-42 (21)
P  24-46 (23)
S  26-49 (24)
Cl 28-49,51 (23)
Ar 30-53 (24)
K  32-54 (23)
Ca 34-54,56 (22)
Sc 36-57 (22)
Ti 38-58,61 (22)
V  40-64 (25)
Cr 42-67 (26)
Mn 44-69 (26)
Fe 45-72 (28)
Co 48-75 (28)
Ni 48-78 (31)
Cu 52-80 (29)
Zn 54-83 (30)
Ga 56-86 (31)
Ge 58-89 (32)
As 60-92 (33)
Se 65-94 (30)
Br 67-97 (31)
Kr 69-100 (32)
Rb 71-101 (31)
Sr 73-105 (33)
Y  77-108 (32)
Zr 79-110 (32)
Nb 81-113 (33)
Mo 83-115 (33)
Tc 85-118 (34)
Ru 87-120 (34)
Rh 89-122 (34)
Pd 91-124 (34)
Ag 93-130 (38)
Cd 96-131 (36)
In 98-135 (38)
Sn 100-137 (38)
Sb 103-139 (37)
Te 106-142 (37)
I  108-144 (37)
Xe 110-147 (38)
Cs 112-151 (40)
Ba 114-153 (40)
La 117-155 (39)
Ce 119-157 (39)
Pr 121-159 (39)
Nd 126-161 (36)
Pm 128-163 (36)
Sm 130-165 (36)
Eu 131-167 (37)
Gd 135-169 (35)
Tb 138-171 (34)
Dy 139,141-173 (34)
Ho 140-175 (36)
Er 144-177 (34)
Tm 145-179 (35)
Yb 148-181 (34)
Lu 150-184 (35)
Hf 154-186 (33)
Ta 155-188 (34)
W  158-190 (33)
Re 160-192 (33)
Os 162-196 (35)
Ir 164-199 (36)
Pt 166-202 (37)
Au 171-205 (35)
Hg 172-208 (37)
Tl 177-210 (34)
Pb 180-214 (35)
Bi 185-217 (33)
Po 190-219 (30)
At 193-223 (31)
Rn 196-228 (33)
Fr 199-232 (34)
Ra 202-234 (33)
Ac 206-236 (31)
Th 209-238 (30)
Pa 212-219,221-240 (28)
U  218-242 (25)
Np 225-244 (20)
Pu 228-247 (20)
Am 231-249 (19)
Cm 232-252 (21)
Bk 235-254 (20)
Cf 237-256 (20)
Es 241-257 (17)
Fm 242-260 (19)
Md 245-260 (16)
No 249-262 (14)
Lr 251-263 (13)
Rf 253-264 (12)
Db 255-265 (11)
Sg 258-266,269 (10)
Bh 260-266 (7)
Hs 263-267,269,273,277 (8)
Mt 266-268 (3)
Ug 267,269,271-273,277,281 (7)
Uh 272 (1)
Ui 277,281,283,285 (4)
Uk 285,289 (2)

3001 different isotopes (including n) on April 2002