IUPAC Periodic Table of the Elements and...
Transcript of IUPAC Periodic Table of the Elements and...
IUPAC Periodic Table of the Elements and Isotopes
Standard atomic weights are the best estimates by IUPAC of atomic weights that are found in normal materials, which are terrestrial materials that are reasonably possible sources for elements and their compounds in commerce, industry, or science. They are determined using all stable isotopes and selected radioactive isotopes (having relatively long half-lives and characteristic terrestrial isotopic compositions). Isotopes are considered stable (non-radioactive) if evidence for radioactive decay has not been detected experimentally.
© IUPAC | This version is dated June 2019.
For the interactive version see ISOTOPESMATTER.COM
Element has two or moreisotopes that are used to
determine its atomic weight.Variations are well known,and the standard atomic
weight is given as lower andupper bounds within square
brackets, [ ].
Element has two or moreisotopes that are used to
determine its standard atomicweight. The isotopic
abundance and atomicweights vary in normal
materials, but upper andlower bounds of the standardatomic weight have not been
assigned by IUPAC.
Element has only one isotopethat is used to determine its
standard atomic weight.Thus, the standard atomicweight is invariant and is
given as a single value withan IUPAC evaluated
uncertainty.
Element has no standardatomic weight because all ofits isotopes are radioactiveand, in normal materials, no
isotope occurs with acharacteristic isotopic
abundance from which astandard atomic weight can
be determined.
hydrogen
H11.008[1.007 84, 1.008 11]
helium
He24.002 602(2)
lithium
Li36.94[6.938, 6.997]
beryllium
Be49.012 1831(5)
boron
B510.81[10.806, 10.821]
carbon
C612.011[12.0096, 12.0116]
nitrogen
N714.007[14.006 43, 14.007 28]
oxygen
O815.999[15.999 03, 15.999 77]
fluorine
F918.998 403 163(6)
neon
Ne1020.1797(6)
sodium
Na1122.989 769 28(2)
magnesium
Mg1224.305[24.304, 24.307]
aluminium
Al1326.981 5385(7)
silicon
Si1428.085[28.084, 28.086]
phosphorus
P1530.973 761 998(5)
sulfur
S1632.06[32.059, 32.076]
chlorine
Cl1735.45[35.446, 35.457]
argon
Ar1839.95[39.792, 39.963]
potassium
K1939.0983(1)
calcium
Ca2040.078(4)
scandium
Sc2144.955 908(5)
titanium
Ti2247.867(1)
vanadium
V2350.9415(1)
chromium
Cr2451.9961(6)
manganese
Mn2554.938 043(2)
iron
Fe2655.845(2)
cobalt
Co2758.933 194(4)
nickel
Ni2858.6934(4)
copper
Cu2963.546(3)
zinc
Zn3065.38(2)
gallium
Ga3169.723(1)
germanium
Ge3272.630(8)
arsenic
As3374.921 595(6)
selenium
Se3478.971(8)
bromine
Br3579.904[79.901, 79.907]
krypton
Kr3683.798(2)
rubidium
Rb3785.4678(3)
strontium
Sr3887.62(1)
yttrium
Y3988.905 84(2)
zirconium
Zr4091.224(2)
niobium
Nb4192.906 37(2)
molybdenum
Mo4295.95(1)
technetium
Tc43
ruthenium
Ru44101.07(2)
rhodium
Rh45102.905 49(2)
palladium
Pd46106.42(1)
silver
Ag47107.8682(2)
cadmium
Cd48112.414(4)
indium
In49114.818(1)
tin
Sn50118.710(7)
antimony
Sb51121.760(1)
tellurium
Te52127.60(3)
iodine
I53126.904 47(3)
xenon
Xe54131.293(6)
caesium
Cs55132.905 451 96(6)
barium
Ba56137.327(7)
hafnium
Hf72178.49(2)
tantalum
Ta73180.947 88(2)
tungsten
W74183.84(1)
rhenium
Re75186.207(1)
osmium
Os76190.23(3)
iridium
Ir77192.217(2)
platinum
Pt78195.084(9)
gold
Au79196.966 570(4)
mercury
Hg80200.592(3)
thallium
Tl81204.38[204.382, 204.385]
lead
Pb82207.2(1)
bismuth
Bi83208.980 40(1)
polonium
Po84
astatine
At85
radon
Rn86
francium
Fr87
radium
Ra88
rutherfordium
Rf104
dubnium
Db105
seaborgium
Sg106
bohrium
Bh107
hassium
Hs108
meitnerium
Mt109
darmstadtium
Ds110
roentgenium
Rg111
copernicium
Cn112
nihonium
Nh113
flerovium
Fl114
moscovium
Mc115
livermorium
Lv116
tennessine
Ts117
oganesson
Og118
lanthanum
La57138.905 47(7)
cerium
Ce58140.116(1)
praseodymium
Pr59140.907 66(1)
neodymium
Nd60144.242(3)
promethium
Pm61
samarium
Sm62150.36(2)
europium
Eu63151.964(1)
gadolinium
Gd64157.25(3)
terbium
Tb65158.925 354(8)
dysprosium
Dy66162.500(1)
holmium
Ho67164.930 328(7)
erbium
Er68167.259(3)
thulium
Tm69168.934 218(6)
ytterbium
Yb70173.045(10)
lutetium
Lu71174.9668(1)
actinium
Ac89
thorium
Th90232.0377(4)
protactinium
Pa91231.035 88(1)
uranium
U92238.028 91(3)
neptunium
Np93
plutonium
Pu94
americium
Am95
curium
Cm96
berkelium
Bk97
californium
Cf98
einsteinium
Es99
fermium
Fm100
mendelevium
Md101
nobelium
No102
lawrencium
Lr103