Current symbols

និមិត្តសញ្ញា	ឈ្មោះ	Etymology of symbol	លេខអាតូម	Relative atomic mass	ក្រុម	ខួប	Metallic character
Ac	អាក់ទីញ៉ូម	from Greek aktinos (ray)	89	&227[227]^{[nb ១]}		7	Actinide
Ag	ប្រាក់ (Silver)	Latin argentum (silver)	47	&107.86822107.8682(2)^{[nb ២]}	11	5	Transition metal
Al	អាលុយមីញ៉ូម (Aluminum)	Latin alumen (alum)	13	&026.9815386826.9815386(8)	13	3	Other metal
Am	Americium	the Americas	95	&243[243]^{[nb ១]}		7	Actinide
Ar	Argon	Greek argon (inert)	18	&039.948139.948(1)^{[nb ២]}^{[nb ៣]}	18	3	ឧស្ម័នកំរ
As	Arsenic	Greek arsenikos (male)	33	&074.92160274.92160(2)	15	4	Metalloid
At	Astatine	Greek astatos (unstable)	85	&210[210]^{[nb ១]}	17	6	Metalloid
Au	មាស	Latin aurum (gold)	79	&196.9665694196.966569(4)	11	6	Transition metal
B	Boron	borax	5	&010.811710.811(7)^{[nb ២]}^{[nb ៣]}^{[nb ៤]}	13	2	Metalloid
Ba	បារ៉្យូម (Barium)	Greek barys (density)	56	&137.3277137.327(7)	2	6	Alkaline earth metal
Be	បេរីល្យូម (Beryllium)	beryl	4	&009.01218239.012182(3)	2	2	Alkaline earth metal
Bh	Bohrium	Niels Bohr	107	&264[264]^{[nb ១]}	7	7	Transition metal
Bi	Bismuth	from German wiss muth (white-mass), becoming bismuth in English	83	&208.980401208.98040(1)	15	6	Other metal
Bk	Berkelium	Berkeley, California	97	&247[247]^{[nb ១]}		7	Actinide
Br	Bromine	Greek bromos (stench)	35	&079.904179.904(1)	17	4	Diatomic nonmetal
C	Carbon	Latin carbo (charcoal)	6	&012.0107812.0107(8)^{[nb ២]}^{[nb ៣]}	14	2	Polyatomic nonmetal
Ca	កាល់ស្យូម (Calcium)	Latin calx (lime)	20	&040.078440.078(4)^{[nb ២]}	2	4	Alkaline earth metal
Cd	Cadmium	Greek kadmia (earth)	48	&112.4118112.411(8)^{[nb ២]}	12	5	Transition metal
Ce	Cerium	Ceres	58	&140.1161140.116(1)^{[nb ២]}		6	Lanthanide
Cf	Californium	State and University of California	98	&251[251]^{[nb ១]}		7	Actinide
Cl	Chlorine	Greek chloros (green-yellow)	17	&035.453235.453(2)^{[nb ២]}^{[nb ៣]}^{[nb ៤]}	17	3	Diatomic nonmetal
Cm	Curium	Pierre and Marie Curie and the traditional -um ending	96	&247[247]^{[nb ១]}		7	Actinide
Cn	Copernicium	Nicolaus Copernicus	112	&285[285]^{[nb ១]}	12	7	Transition metal
Co	Cobalt	from German kobold	27	&058.933195558.933195(5)	9	4	Transition metal
Cr	Chromium	Greek chroma (color)	24	&051.9961651.9961(6)	6	4	Transition metal
Cs	សេស្យូម (Cesium)	Latin caesius (sky blue)	55	&132.90545192132.9054519(2)	1	6	Alkali metal
Cu	ទង់ដែង (Copper)	Latin Cuprum (Cyprus)	29	&063.546363.546(3)^{[nb ៣]}	11	4	Transition metal
Db	Dubnium	Dubna, Russia	105	&262[262]^{[nb ១]}	5	7	Transition metal
Ds	Darmstadtium	Darmstadt, Germany	110	&271[271]^{[nb ១]}	10	7	Unknown
Dy	Dysprosium	Greek dysprositos	66	&162.5001162.500(1)^{[nb ២]}		6	Lanthanide
Er	Erbium	Ytterby, Sweden	68	&167.2593167.259(3)^{[nb ២]}		6	Lanthanide
Es	Einsteinium	Albert Einstein	99	&252[252]^{[nb ១]}		7	Actinide
Eu	Europium	Europe	63	&151.9641151.964(1)^{[nb ២]}		6	Lanthanide
F	Fluorine	Latin fluo (flow)	9	&018.9984032518.9984032(5)	17	2	Diatomic nonmetal
Fe	ដែក (Iron)	Latin ferrum (iron)	26	&055.845255.845(2)	8	4	Transition metal
Fl	Flerovium	Flerov Laboratory of Nuclear Reactions	114	&289[289]^{[nb ១]}	14	7	Unknown
Fm	Fermium	Enrico Fermi	100	&257[257]^{[nb ១]}		7	Actinide
Fr	ហ្វ្រង់ស្យូម (Francium)	France	87	&223[223]^{[nb ១]}	1	7	Alkali metal
Ga	Gallium	Latin Gallia (Gaul)	31	&069.723169.723(1)	13	4	Other metal
Gd	Gadolinium	gadolinite	64	&157.253157.25(3)^{[nb ២]}		6	Lanthanide
Ge	Germanium	Germany	32	&072.64172.64(1)	14	4	Metalloid
H	អុីដ្រូសែន (Hydrogen)	Greek hydor gennao (liquid-produce)	1	&001.0079471.00794(7)^{[nb ២]}^{[nb ៣]}^{[nb ៤]}	1	1	Diatomic nonmetal
He	អេល្យូម	Greek helios (Sun)	2	&004.00260224.002602(2)^{[nb ២]}^{[nb ៣]}	18	1	ឧស្ម័នកំរ
Hf	Hafnium	Latin Hafnia (Copenhagen)	72	&178.492178.49(2)	4	6	Transition metal
Hg	Mercury	Greek hydrargyrum (liquid silver)	80	&200.592200.59(2)	12	6	Transition metal
Ho	Holmium	Latin Holmia (Stockholm)	67	&164.930322164.930 32(2)		6	Lanthanide
Hs	Hassium	Hesse, Germany	108	&277[277]^{[nb ១]}	8	7	Transition metal
I	Iodine	Greek ioeides (violet)	53	&126.904473126.904 47(3)	17	5	Diatomic nonmetal
In	Indium	indigo blue	49	&114.8183114.818(3)	13	5	Other metal
Ir	Iridium	Greek iris (rainbow)	77	&192.2173192.217(3)	9	6	Transition metal
K	ប៉ូតាស្យូម (Potassium)	Latin kalium (potassium)	19	&039.0983139.0983(1)	1	4	Alkali metal
Kr	Krypton	Greek kryptos (concealment)	36	&083.798283.798(2)^{[nb ២]}^{[nb ៤]}	18	4	ឧស្ម័នកំរ
La	ឡង់តាន	Greek lanthano (escape)	57	&138.905477138.90547(7)^{[nb ២]}		6	Lanthanide
Li	លីចូម (Lithium)	Greek lithos (rock)	3	&006.94126.941(2)^{[nb ២]}^{[nb ៣]}^{[nb ៤]}^{[nb ៥]}	1	2	Alkali metal
Lr	Lawrencium	Ernest O. Lawrence	103	&262[262]^{[nb ១]}	3	7	Actinide
Lu	Lutetium	Latin Lutetia (Paris)	71	&174.9671174.967(1)^{[nb ២]}	3	6	Lanthanide
Lv	Livermorium	Lawrence Livermore National Laboratory	116	&292[292]^{[nb ១]}	16	7	Unknown
Md	Mendelevium	Dmitri Mendeleyev	101	&258[258]^{[nb ១]}		7	Actinide
Mg	ម៉ាញ៉េស្យូម (Magnesium)	Magnesia, Greece	12	&024.3050624.3050(6)	2	3	Alkaline earth metal
Mn	Manganese	Greek magnes (magnet)	25	&054.938045554.938045(5)	7	4	Transition metal
Mo	Molybdenum	Greek molybdos (lead)	42	&095.94295.94(2)^{[nb ២]}	6	5	Transition metal
Mt	Meitnerium	Lise Meitner	109	&268[268]^{[nb ១]}	9	7	Unknown
N	Nitrogen	Greek nitron (niter)	7	&014.0067214.0067(2)^{[nb ២]}^{[nb ៣]}	15	2	Diatomic nonmetal
Na	សូដ្យូម (Sodium)	Latin natrium (sodium)	11	&022.98976928222.98976928(2)	1	3	Alkali metal
Nb	ញ៉ូប្យូម (Niobium)	Niobe	41	&092.90638292.906 38(2)	5	5	Transition metal
Nd	Neodymium	Greek neos didymos (novelty-twin)	60	&144.2423144.242(3)^{[nb ២]}		6	Lanthanide
Ne	នេអុង	Greek neos (novelty)	10	&020.1797620.1797(6)^{[nb ២]}^{[nb ៤]}	18	2	ឧស្ម័នកំរ
Ni	Nickel	German kupfernickel (nickeline)	28	&058.6934258.6934(2)	10	4	Transition metal
No	Nobelium	Alfred Nobel	102	&259[259]^{[nb ១]}		7	Actinide
Np	Neptunium	Neptune	93	&237[237]^{[nb ១]}		7	Actinide
O2	អុកស៊ីសែន	Greek oxys (acid)	8	&015.9994315.9994(3)^{[nb ២]}^{[nb ៣]}	16	2	Diatomic nonmetal
Os	Osmium	Greek osme (odor)	76	&190.233190.23(3)^{[nb ២]}	8	6	Transition metal
P	Phosphorus	Greek phosphoros (light bearer)	15	&030.973762230.973762(2)	15	3	Polyatomic nonmetal
Pa	Protactinium	Greek protos and actinium	91	&231.035882231.03588(2)^{[nb ១]}		7	Actinide
Pb	Lead	Latin plumbum (lead)	82	&207.21207.2(1)^{[nb ២]}^{[nb ៣]}	14	6	Other metal
Pd	Palladium	Pallas (genitive Pallados)	46	&106.421106.42(1)^{[nb ២]}	10	5	Transition metal
Pm	Promethium	Prometheus	61	&145[145]^{[nb ១]}		6	Lanthanide
Po	Polonium	Poland	84	&210[210]^{[nb ១]}	16	6	Other metal
Pr	Praseodymium	Greek prasios (green)	59	&140.907652140.90765(2)		6	Lanthanide
Pt	Platinum	Spanish platina (silver)	78	&195.0849195.084(9)	10	6	Transition metal
Pu	Plutonium	Pluto	94	&244[244]^{[nb ១]}		7	Actinide
Ra	រ៉ាដ្យូម (Radium)	Latin radius (ray)	88	&226[226]^{[nb ១]}	2	7	Alkaline earth metal
Rb	រុយប៊ីដ្យូម (Rubidium)	Latin rubidus (red)	37	&085.4678385.4678(3)^{[nb ២]}	1	5	Alkali metal
Re	Rhenium	German Rheinprovinz	75	&186.2071186.207(1)	7	6	Transition metal
Rf	Rutherfordium	Ernest Rutherford	104	&261261^{[nb ១]}	4	7	Transition metal
Rg	Roentgenium	Wilhelm Conrad Röntgen	111	&272[272]^{[nb ១]}	11	7	Unknown
Rh	Rhodium	Greek rhodon (rose)	45	&102.905502102.905 50(2)	9	5	Transition metal
Rn	Radon	radium and emanation	86	&220[220]^{[nb ១]}	18	6	ឧស្ម័នកំរ
Ru	Ruthenium	Latin Ruthenia (Russia)	44	&101.072101.07(2)^{[nb ២]}	8	5	Transition metal
S	Sulfur (Sulphur)	Latin sulfur	16	&032.065532.065(5)^{[nb ២]}^{[nb ៣]}	16	3	Polyatomic nonmetal
Sb	Antimony	Latin stibium (eye liner)	51	&121.7601121.760(1)^{[nb ២]}	15	5	Metalloid
Sc	ស្កង់ដ្យូម (Scandium)	Scandinavia	21	&044.955912644.955912(6)	3	4	Transition metal
Se	Selenium	Greek selene (Moon)	34	&078.96378.96(3)^{[nb ៣]}	16	4	Polyatomic nonmetal
Sg	Seaborgium	Glenn T. Seaborg	106	&266[266]^{[nb ១]}	6	7	Transition metal
Si	Silicon	Latin silex (flint)	14	&028.0855328.0855(3)^{[nb ៣]}	14	3	Metalloid
Sm	Samarium	samarskite	62	&150.362150.36(2)^{[nb ២]}		6	Lanthanide
Sn	Tin	Latin stannum (tin)	50	&118.7101118.710(7)^{[nb ២]}	14	5	Other metal
Sr	ស្ត្រុងចូម (Strontium)	Strontian	38	&087.62187.62(1)^{[nb ២]}^{[nb ៣]}	2	5	Alkaline earth metal
Ta	តង់ដាល់ (Tantalum)	King Tantalus	73	&180.947882180.94788(2)	5	6	Transition metal
Tb	Terbium	Ytterby, Sweden	65	&158.925352158.92535(2)		6	Lanthanide
Tc	Technetium	Greek technetos (artificial)	43	&098[98]^{[nb ១]}	7	5	Transition metal
Te	Tellurium	Greek tellus (Earth)	52	&127.603127.60(3)^{[nb ២]}	16	5	Metalloid
Th	Thorium	Thor	90	&232.038062232.03806(2)^{[nb ១]}^{[nb ២]}		7	Actinide
Ti	Titanium	the Titans	22	&047.867147.867(1)	4	4	Transition metal
Tl	Thallium	Greek thallos (shoot)	81	&204.38332204.3833(2)	13	6	Other metal
Tm	Thulium	Thule and the traditional -ium ending	69	&168.934212168.93421(2)		6	Lanthanide
U	Uranium	Uranus	92	&238.028913238.02891(3)^{[nb ១]}^{[nb ២]}^{[nb ៤]}		7	Actinide
Uuo	Ununoctium	Latin uni, uni, and oct (one, one, eight)	118	&294[294]^{[nb ១]}	18	7	Unknown
Uup	Ununpentium	Latin uni, uni, and Greek pent (one, one, five)	115	&288[288]^{[nb ១]}	15	7	Unknown
Uus	Ununseptium	Latin uni, uni, and sept (one, one, seven)	117	&294[294]^{[nb ១]}	17	7	Unknown
Uut	Ununtrium	Latin uni, uni, and Greek tri (one, one, three)	113	&284[284]^{[nb ១]}	13	7	Unknown
V	វ៉ាណាដ្យូម (Vanadium)	Vanadis	23	&050.9415150.9415(1)	5	4	Transition metal
W	Tungsten	German wolfram (wolf-froth)	74	&183.841183.84(1)	6	6	Transition metal
Xe	Xenon	Greek xenos (alien)	54	&131.2936131.293(6)^{[nb ២]}^{[nb ៤]}	18	5	ឧស្ម័នកំរ
Y	អុីទ្រីយ៉ូម (Yttrium)	Ytterby, Sweden	39	&088.90585288.90585(2)	3	5	Transition metal
Yb	Ytterbium	Ytterby, Sweden	70	&173.043173.04(3)^{[nb ២]}		6	Lanthanide
Zn	Zinc	German zin (tin)	30	&065.409465.409(4)	12	4	Transition metal
Zr	Zirconium	zircon	40	&091.224291.224(2)^{[nb ២]}	4	5	Transition metal

Legend for category color

Background color shows subcategory in the metal–nonmetal range:
លោហៈ						Metalloid	អលោហៈ			Unknown chemical properties
អាល់កាឡាំង	Alkaline earth metal	Lanthanide	Actinide	Transition metal	Other metal		Polyatomic nonmetal	Diatomic nonmetal	ឧស្ម័នកំរ

Antimatter atoms are denoted by a bar above the symbol for their matter counterpart, so e.g. H is the symbol for antihydrogen.

ឯកសារយោង

Element name etymologies. Retrieved July 15, 2005.
Atomic Weights of the Elements 2001, Pure Appl. Chem. 75(8), 1107–1122, 2003. Retrieved June 30, 2005. Atomic weights of elements with atomic numbers from 1–109 taken from this source.
IUPAC Standard Atomic Weights Revised Archived 2008-03-05 at the វេយប៊ែខ ម៉ាស៊ីន. (2005).
WebElements Periodic Table. Retrieved June 30, 2005. Atomic weights of elements with atomic numbers 110–116 taken from this source.
Lapp, Ralph E. Matter. Life Science Library. New York: Time Incorporated. 1963.
Leighton, Robert B. Principles of Modern Physics. New York: McGraw-Hill. 1959.
Scerri, E.R. "The Periodic Table, Its Story and Its Significance". New York, Oxford University Press. 2007.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 The element does not have any stable nuclides, and a value in brackets, e.g. [209], indicates the mass number of the longest-lived isotope of the element. However, three elements, thorium, protactinium, and uranium, have a characteristic terrestrial isotopic composition, and thus their atomic mass given.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 The isotopic composition of this element varies in some geological specimens, and the variation may exceed the uncertainty stated in the table.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 The isotopic composition varies in terrestrial material such that a more precise atomic weight can not be given.
1 2 3 4 5 6 7 8 The isotopic composition of the element can vary in commercial materials, which can cause the atomic weight to deviate significantly from the given value.
↑ The atomic weight of commercial Lithium can vary between 6.939 and 6.996—analysis of the specific material is necessary to find a more accurate value.

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[fn_1-1] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 The element does not have any stable nuclides, and a value in brackets, e.g. [209], indicates the mass number of the longest-lived isotope of the element. However, three elements, thorium, protactinium, and uranium, have a characteristic terrestrial isotopic composition, and thus their atomic mass given.

[fn_2-2] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 The isotopic composition of this element varies in some geological specimens, and the variation may exceed the uncertainty stated in the table.

[fn_4-3] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 The isotopic composition varies in terrestrial material such that a more precise atomic weight can not be given.

[fn_3-4] 1 2 3 4 5 6 7 8 The isotopic composition of the element can vary in commercial materials, which can cause the atomic weight to deviate significantly from the given value.

[5] The atomic weight of commercial Lithium can vary between 6.939 and 6.996—analysis of the specific material is necessary to find a more accurate value.

[nb ១]

[nb ២]

[nb ៣]

[nb ៤]

[nb ៥]