PERIODIC TABLE

NIST

Group . . National Institute of
1 Atomic Properties of the Elements srendards and 18
USS. Depariment of Commerce
1A VIIA
2 i 7
1 Siz Frequently used fundamental physical constants Physical Measurement Standard 2 So
H For the most accurate values of these and other constants, visit physics.nist gov/constants Laboratory Reference Data He
1) tydrogen 1 second = 9 192 631 770 periods of radiation corresponding to the transition www.nist.gov/pml www.nist.gov/srd Halon
ip between the two hyperfine levels of the ground state of “Cs 44 16 47 | so0esoe
ts 2 speed of light in vacuum c 299 792 458 ms” (exact) _] Solids 13 15 18°
13.5984 faa Planck constant h 6.62607x10“Js (N= h/2m) © iquids IIA IVA VA VIA VIIA | 24.5874
3 *s, elementary charge e 1.602 177 x 10°C 5 ,|6 ‘P,|e ‘Se 9 *:,/10 ‘s,
Li " “Be. electron mass m 9.109 38 x 107" kg CI Gases ve C F N.
2 A e me? (0,510 999 MeV ( artificially e
Lithium | Beryllium proton mass m, 4,672 622 x 107” kg Prepared Boron Carbon | Nitrogen Fluorine Neon
‘an ee fine-structure constant a 4/137.035 999 nts Roar ies! baspenesel = st
3°28 18°28 “1 s'2s'ap | 18°2s'29' 8°25 1s'28"2p" | 18°2
5.3917 9.3227 Echaty concen be pl acs it 8.2980 11.2603 | 14.5344 17.4228 | 21.5645
c z x iz fae =
11 ’s,,/12  's, ‘i 13 *P?,/14 °P,}15 ‘sz, 17 *P3,/18  's,
R R,hc 13.605 69 eV 2 fo 2 v2 0
Na Boltzmann constant k 1,380 6 x10" JK” Si cl Ar
3} sodium | Magnesum Aurinum | Siicon | Phosphorus i ‘Argon
22.98976928| 24,305" 3 4 5 6 7 8 9 10 1 42 | 26.9815385 | 28.085" | 30.97376200 35.45" 39.948
[Ne}3s [Ne}3s” [Ne}3s°3p | [Ne]3s"3p° | [Ne}3s"3p" {Ne}3s*3p° ‘3p
5.1391 7.6462 HIB IVB VB VIB VIIB vill IB IIB 5.9858 8.1517 10.4867 12.9676 15.7596
19 ’s,./20 ‘'s,|/21 *0,,|22 *F,/23 ‘F,,/24 ‘’s,/25 °s,.|26 ‘D,|27 ‘F,.]28 ‘F,/29 ’s,,/30 ‘'s,|31 *P%,/32  ‘P,|33 ‘ss, 35 7P3,/36 ‘s,
3 . .
3 Ca | Sc | Ti | V | Cr | Mn| Fe | Co | Ni | Cu | Zn | Ga | Ge | As Br | Kr
: 4} potassium | Cakium | Scandium | Titanium | Vanadium | Chromum | Manganese | fron Cobalt Nickel Copper Zine Gallium | Germanium | Arsenic | Selenium | Bromine | Krypton
o 39,0983 40,078 44,955908 AT.867 50.9415 51.9961 54, 938044 55.845 58.933194 58.6934 63.546 65.38 69.723 72.630 74,921595 78,971 79.904* 83.798
[Ans [Ar}ss? Arjad4s? | [Arad’4s* | farad’4s? | farad’4s | (anad°4s? | [arsd’4s? | fanad’4s? | [arad’ss’ | fAqsa'®4s | fansd'%4s? | [Aqad’4s’4p |[Ansd'°4s°4p" | [Arjad'%4s“4p° | [Ar]3d'°4s"4p* |[Anjad 4s"4p® |IArad “asap”
4.3407 6.1132 6.5615 6.8281 6.7462 6.7665 7.4340 7.9025 7.8810 7.6399 7.7264 9.3942 5.9993 7.8994 9.7886 9.7524 | 11.8138 | 13.9996
37 ’s,,/38 ‘s,/39 %,,/40 41 ‘,,/42 ’s,/43 °s..|44 ‘F,/45 ‘F., 47 *s,,|48 's,/49 *Pi,/50 °P,/51 ‘s3,/52  *p,|53 *P3, |54 1S,
Sr Zr | Nb | Mo| Tc | Ru Cd | In | Sn | Sb | Te I
5] Rubicium | strontium | yttrium | Zirconium | Niobium | Molybdenum | Technetium | Rutherium | Rhodium | Palladium |  SiNer | Cadmium | Indium Tin Antimony | Telurium Iodine Xenon
85.4678 87.62 88.90584 91.224 92.90637 95.95 (98) ~ 101.07 102.90550 106.42 107.8682 112.414 114.818 118.710 121.760 127.60 126.90447 131.293
[kr}5s [krl5s? ikrjad5s* | Kried’ss’ | xriad’ss | (Kra°5s | {Krl4e%Ss’ | [Krj4a’Ss ikrisa’ss Ikrj4d"" (Krisa'Ss | (kri4d"°5s? | [Kr]4d'%5s5p ||Kr}4d""Ss”5p" | (Kri4a"°5s°5p° | IKrl4d"958°5p' | [Kr]4d''5s"5p° |IKeled “5s6p>
AATTY 5.6949 6.2173 6.6339 6.7589 7.0924 7.1194 7.3605 74589 8.3369 7.5762 8.9938 5.7864 7.3439 8.6084 9.0097 10.4513 12.1298
55 ’s,,/56 's, 72 = *F,/73 “‘F..|74 °D,|75 °s..|76 °0,|77 “‘F,.|78 °0,|79 *s,,|80 'S,|81 *P°,/82 ‘p,|83 ‘ss,/84 °P,/85 *P:,|86 's,
Cs | Ba Hf | Ta | W | Re | Os | Ir | Pt | Au | Hg} Ti | Pb | Bi | Po | At | Rn
6] cesium Barium Hafrium | Tantalum | Tungsten | Rhenium | Osmium | Iridium | Platinum Gokt Mercury | Thallium Lead Bismuth | Polonium | Astatne | Radon
132,9054520| 137.327 178.49 | 180,94788 | 183.84 | 186.207 | 190.23 | 192.217 | 195.084 | 196966569 | 200.592 | 204.38" 207.2 | 208,98040 | (209) (210) (222)
[xe]és [e}és® [xe}4t"5d°6s"| (xej4t!*5d°6s" | xeq4t"*5d‘6s” | [xe]4t'*Sa° Gs” | [Xe}4t"“5d°6s" | (Xe}4f"*5d’6s°| [Xe}4f"“Sd°6s | [xe]41"*5a""6s IPOH Sd 6s] © [Hg}6p [Hgl6p” H}6p® THol6" [Hgl6p° THgiép®
3.8939 5.2117 6.8251 7.5496 7.8640 7.8335 8.4382 8.9670 8.9588 9.2256 10.4375 6.1083 7A167 7.2855 8.414 9.31751 10.7485,
87 *s,,/88  's, 104 *F,/105 ‘F,,/106 107 108 109 110 111 112 113 114 115 116 117 118
Fr | Ra Bh | Hs | Mt | Ds Cn | Uut) Fl |Uup| Lv |Uus |Uuo
7) Francium | Radium Rutherfordium! Dubnium | Seaborgium | Bohrium | Hassium | Meitnerium |Darmstadtium| Roenigenium| Copemicium | Ununtrium | Flerovium |Ununpentium | Livermorium | Ununseptium | Ununoctium
(223) (226) (267) (268) (271) 272). (270) (276) (281) (280) (285) (284) (289) (288) (293) (294) (294)
[Rnj7s [Roj7s* (Rn)5t"*6477s" (Rnjst"“6d°7s"| [Rn Bae IRnj5t"6d°75" [Rnj5t"*6d°7s)
AQT2T 5.2784 6.01 68 Lea 76
hie ta g/57 %0,,)58  'c:/59 61 ‘H,/62 F,]63 °s;,]64 °0:/65 W.,/66 1/67 ‘1.,[68 “H,/69 ‘F:,|70 ‘s,|71 °D,,
s 2| La | Ce | Pr Pm | Sm | Eu | Gd | Tb Ho | Er | Tm | Yb | Lu
ie 5
symboi_|28  'G; | Lanthanum | Cerium Praseodymium Promethium | Samarium | Europium | Gadolinium | Terbium | Dysprosium | Holmium | Erbium | Thulum | Yiterbium | Lutetium
y" &| 138.90547 | 140.116 | 140.907 (145) 450.36 | 151.964 | 157.25 | 168,92535 | 162,500 | 164.93033 | 167.259 | 168.9342 | 173.054 | 174,9668
Ce =| [xe}sd6s’ | [xe}4tsa6s’ | [xe}4f°6s” [xel4f'es” | [xel4t%es’ | [xelst’es’ | [Xel4t'sdés’ | (xeyst’es’ | [xe}4r%6s” | ixejstl'és’ | [xejst'6s” | [xeyst"6s? | [xeyst"es” | rxej4t"*sdes”
Name—_|__ Cerium 5.5769 5.5386 5.473, 5.582 5.6437 5.6704 6.1498 5.8638 5.9391 6.0215 6.1077 6.1843 6.2542 5.4259
Standard | 140,116 3 89 *D,,/90  *F,/91 “Ki. 93 L,./94 F,|95 °s;,/96 °0:/97 “Hi,./98 1,/99 ‘I..|100 *H,|101 *F;,/102 ‘s,/103 ‘Pi,
‘Atomi 2
Atomic | [XelAtSa6s 2| Ac Pa Pu Cm Cf | Es | Fm | Md| No | Lr
5.5386, | Actinium | Thorium | Protactinium | Uranium | Neptunium | Plutonium | Americium | Curium | Betkelium | Californium | Einsteinium | Fermium |Mendelevium| Nobelium | Lawrencium
at | (227)__‘| 232.0377 | 231.03588 | 23802891] (237) | (aay) | (243) (247) (247) (251) (252) (257) | (258) (259) (262)
Ground-state —_lonization Rnjea7s’ | [Rnj6d7s* | (Rn)st*6a7s* | [Rn|St°6d7s” | [Rnjsf‘ed7s* | [Rnjsf7s* | [RnjSf'7s* | (Rn|Sf6a7s* | [RnjsP7s* | [Rnjst°7s? | pRnjst''7s* | [Rnjst*7s* | pRnjs 7s? | [RnI5t'*7s? |pRn|5t*7s*7p
Configuration Energy (eV) 5.3802 6.3067 5,89 6.1941 6.2655 6.0258 5.9738 5.9914 6.1978 6.2817 6.3676 6,50 6.58 6,65 4.90

‘Based upon “°C, () indicates the mass number of the longestelived isotope,

“IUPAC conventional atomic weights; standard atomic weights for these

For a description of the data, visit physics.nist.gov/data
NIST SP 966 (September 2014)

elements are expressed in intervals; see iupac.org for an explanation and values,