Atomic Number (z)
|
Name
|
Symbol
|
Year Discovered
|
Discoverer
|
Derivation of Name/Symbol
|
1
|
hydrogen
|
H
|
1766
|
Henry Cavendish
|
From the Greek hydro for 'water' and genes for
'forming' as it burned in air to form water.
|
|
2
|
helium
|
He
|
1868
|
Pierre-Jules-Cesar Janssen
|
From the Greek helios for 'sun'. It was
discovered by spectroscopy during a solar eclipse in the sun's chromosphere.
|
|
3
|
lithium
|
Li
|
1818
|
Johan August Arfvedson
|
From the Latin lithos for 'stone' because
lithium was thought to exist only in minerals as it was first found in the
mineral petalite.
|
|
4
|
beryllium
|
Be
|
1798
|
Nicholas-Louis Vauquelin
|
From the Greek berryllos for 'beryl' the
gemstone in which it was first found.
|
|
5
|
boron
|
B
|
1808
(isolated)
|
Humphry Davy
|
From the Arabic buraq for 'white'. It was first
isolated in an impure state by Louis-Joseph Gay-Lussac and Louis-Jacques
Thenard, but it was Humphry Davy who first prepared pure boron using
electrolysis.
|
|
6
|
carbon
|
C
|
-
|
known since ancient times
|
From the Latin carbo for 'charcoal'. In 1797,
Smithson Tennant showed that diamond is pure carbon.
|
|
7
|
nitrogen
|
N
|
1772
|
Daniel Rutherford
|
From the Latin nitrium and Greek nitron for
'native soda' and genes for 'forming' because it is found in potassium
nitrate, saltpeter or nitre or native soda.
|
|
8
|
oxygen
|
O
|
1774
|
Joseph Priestly
|
>From the Greek oxys for 'acid' and genes for
'forming' since Antoine-Laurent Lavoisier originally thought that oxygen was
an acid producer because when he burnt phosphorus and sulfur and dissolved
them in water they produced acids.
|
|
9
|
fluorine
|
F
|
1886
(isolated)
|
Ferdinand Frederic, Henri Moissan
|
From the Latin fluere for 'flow or flux' as the
mineral fluorspar was used as a flux in metallurgy because of its low melting
point
|
|
10
|
neon
|
Ne
|
1898
|
Sir William
Ramsay, Morris M. Travers
|
From the Greek neos for 'new'
|
|
11
|
sodium
|
Na
|
1807
|
Sir Humphry Davy
|
From the English soda and Latin sodanum for
'headache remedy'. The chemical symbol derives from the Latin natrium for
soda.
|
|
12
|
magnesium
|
Mg
|
1808
(separation from mineral)
|
Sir Humphry Davy
|
From Magnesia a district in Thessalia in
northeastern Greece
|
|
13
|
aluminium
|
Al
|
1825
(isolated)
|
Hans Christian Oersted
|
From the Latin alum and alumen for 'stringent'
since the early Romans called any substance with a stringent taste alum.
|
|
14
|
silicon
|
Si
|
1924
|
Jons Jacob
Berzelius
|
From the Latin silex and silicis for 'flint'.
Originally it was thought to be a metal and called silicium, when this was
shown to be wrong the name was changed to silicon.
|
|
15
|
phosphorus
|
P
|
1669
|
Hennig Brand
|
From the Greek phosphorus for 'bringing light'
as white phosphorus oxidises spontaneously in air and glows in the dark
|
|
16
|
sulfur/sulphur
|
S
|
-
|
known since ancient times
|
From Latin sulfurium and the Sanskrit sulveri.
Sulfur was known as brenne stone, combustible stone, from which brim-stone is
derived
|
|
17
|
chlorine
|
Cl
|
1774
|
Carl Wilhelm Scheele
|
From the Greek chloros for 'pale green', the
colour of the element.
|
|
18
|
argon
|
Ar
|
1894
|
Sir William Ramsay, Lord Raleigh
|
From the Greek argos for 'lazy' because it does
not combine with other elements.
|
|
19
|
potassium
|
K
|
1807
(isolated)
|
Sir Humphry Davy
|
From the English potash as it was found in
caustic potash (KOH). The chemical symbol derives from the Latin kalium via
the Arabic qali for alkali
|
|
20
|
calcium
|
Ca
|
1808
(isolated)
|
Sir Humphry Davy
|
From the Latin calx for 'lime or limestone' in
which it is found.
|
|
21
|
scandium
|
Sc
|
1879
|
Lars Fredrik Nilson
|
From the Latin scandia for Scandanavia where
the mineral was found
|
|
22
|
titanium
|
Ti
|
1791
|
The Reverend William Gregor
|
From the Latin titans, mythological first sons
of the earth
|
|
23
|
vanadium
|
V
|
1801/1830
|
Andres Manuel del Rio y Fernandez/Nils Gabriel
Sefstrom
|
From the Scandanavian Freyja Vanadis, goddess
of love and beauty, because of its many beautiful coloured compounds
|
|
24
|
chromium
|
Cr
|
1797
|
Louis-Nicholas Vauquelin
|
From the Greek chroma for 'colour' as there are
many coloured compounds of chromium
|
|
25
|
manganese
|
Mn
|
1774
(isolated)
|
Johan Gottlieb Gahn
|
From the Latin magnes for 'magnet' since the
mineral pyrolusite (MnO2) has magnetic properties
|
|
26
|
iron
|
Fe
|
-
|
known since ancient times
|
From the Anglo Saxon iron. The symbol is
derived form the Latin ferrum for 'firmness'
|
|
27
|
cobalt
|
Co
|
1739
|
Georg Brandt
|
From the German kobold for 'evil spirits' who
were thought to cause miners problems since the mineral contained arsenic
which was detrimental to their health.
|
|
28
|
nickel
|
Ni
|
1751
|
Axel Fredrik Cronstedt
|
From the German nickel for 'deceptive spirit'
as miners called the mineral niccolite kupfernickel (false copper) as it
resembled copper ores in appearance but no copper was found in the ore.
|
|
29
|
copper
|
Cu
|
-
|
known since ancient times
|
From the Latin cuprum for 'Cyprus' where the
Romans first obtained copper
|
|
30
|
zinc
|
Zn
|
-
|
known since ancient times
|
From the German zink
|
|
31
|
gallium
|
Ga
|
1875
|
Paul-Emile Lecoq de Boisbaudran
|
From the Latin gallia for France, or possibly
from the Latin gallus for 'le coq or cock' after its Fench discoverer.
Predicted by Mendeleev who called it eka-aluminium.
|
|
32
|
germanium
|
Ge
|
1886
|
Clemens Winkler
|
From the Latin germania for Germany after its
German discoverer. Predicted by Mendeleev who called it eka-silicon.
|
|
33
|
arsenic
|
As
|
-
|
known since ancient times
|
From the Latin arsenicum and the Greek
arsenikos for the yellow arsenic ore, sounds similar to the Greek arsenikon
for 'male or potent' possibly referring to its toxicity.
|
|
34
|
selenium
|
Se
|
1817
|
Jons Jacob
Berzelius
|
From the Greek Selene, goddess of the moon,
because the element is found with tellurium (named after Tellus, Roman
goddess of the earth)
|
|
35
|
bromine
|
Br
|
1826
|
Antoine-Jerome Balard
|
From the Greek bromos for 'stench'
|
|
36
|
krypton
|
Kr
|
1898
|
Sir William Ramsay, Morris M. Travers
|
From the Greek kryptos for 'hidden'
|
|
37
|
rubidium
|
Rb
|
1861
|
Robert Bunsen, Gustav Kirchoff
|
From the Latin rubidus for deepest red because
of the two deep red lines in its spectrum
|
|
38
|
strontium
|
Sr
|
1792
|
Thomas Charles Hope
|
From Strontian a town in Scotland where the
mineral strontianite is found
|
|
39
|
yttrium
|
Y
|
1794
|
Johan Gadolin
|
From the Swedish village of Ytterby where the
mineral gadolinite (ytterbite) was found
|
|
40
|
zirconium
|
Zr
|
1789
|
Martin Heinrich Klaproth
|
From the Arabic zargun for 'gold-like'
|
|
41
|
niobium
|
Nb
|
1801
|
Charles Hatchett
|
From the Greek Niobe, daughter of Tantalus,
since the elements niobium and tantalum were originally thought to be
identical elements
|
|
42
|
molybdenum
|
Mo
|
1778
|
Carl Welhelm Scheele
|
From the Greek molybdos for 'lead' as the
ancient Greeks used this term for any black mineral which left a mark
|
|
43
|
technetium
|
Tc
|
1937
(synthesised)
|
Carlo Perrier, Emilio Segre
|
From the Greek technetos for 'artificial'.
|
|
44
|
ruthenium
|
Ru
|
1844
(isolated)
|
Karl Karlovich Klaus
|
From the latin ruthenia, the old name for
Russia
|
|
45
|
rhodium
|
Rh
|
1803
|
William Hyde Wollaston
|
From the Greek rhodon for rose because of the
rose coloured solutions of its salts
|
|
46
|
palladium
|
Pd
|
1803
|
William Hyde Wollaston
|
From the second largets asteroid of the Solar
System, Pallus, named after the goddess of wisdom and arts, Pallas Athene, as
the element was discovered 1 year after the discovery of the asteroid.
|
|
47
|
silver
|
Ag
|
-
|
known since ancient times
|
From the Anglo-Saxon seofor and siolfur. The
chemical symbol derives from the Latin argentum and Sanskrit argunas for
'bright'
|
|
48
|
cadmium
|
Cd
|
1817
|
Friedrich Strohmeyer
|
From the Greek kadmeia for 'calamine, zinc
carbonate' as it was found as an impurity with zinc carbonate in nature
|
|
49
|
indium
|
In
|
1863
|
Ferdinand Reich, Hieronymus Theodor Richter
|
From indigo for the indigo-blue line in the
element's spectrum
|
|
50
|
tin
|
Sn
|
-
|
known since ancient times
|
From the Anglo-Saxon tin. The chemical symbol
is derived from the Latn stannum for alloys containing lead
|
|
51
|
antimony
|
Sb
|
-
|
known since ancient times
|
From the Greek anti and monos for 'not alone'
because it was found in many compounds. The symbol Sb comes from the original
name, stibium.
|
|
52
|
tellurium
|
Te
|
1782
|
Franz Joseph Muller von Reichenstein
|
From the Latin Tellus, Roman goddess of the
earth
|
|
53
|
iodine
|
I
|
1811
|
Barnard Courtois
|
From the Greek ioeides for 'violet coloured'
because of its violet vapours
|
|
54
|
xenon
|
Xe
|
1898
|
Sir William Ramsay, Morris M. Travers
|
From the Greek xenon for 'stranger'
|
|
55
|
cesium/caesium
|
Cs
|
1860
|
Robert Wilhelm Bunsen, Gustav Robert Kirchoff
|
From the Latin caesius for 'sky blue colour'
which was the colour of the caesium line in the spectroscope.
|
|
56
|
barium
|
Ba
|
1808
(isolated)
|
Sir Humphry Davy
|
From the Greek barys for 'heavy' as it was
found in the mineral heavy spar.
|
|
57
|
lanthanum
|
La
|
1839
|
Carl Gustaf Mosander
|
From the Greek lanthanein 'to escape notice'
because it hid in cerium ore and was difficult to separate out
|
|
58
|
cerium
|
Ce
|
1803
|
Jons Jacob Berzelius, Wilhelm von Hisinger,
Martin Heinrich Klaproth
|
From the planetoid Ceres which was named after
the Roman goddess of agriculture.
|
|
59
|
praseodymium
|
Pr
|
1885
|
Carl F. Auer von Welsbach
|
From the Greek prasios for 'green' and didymos
for 'twin' because of the pale green salts it forms. Carl F. Auer von
Welsbach separated praseodymium and neodymium from a didymium sample.
|
|
60
|
neodymium
|
Nd
|
1885
(isolated from mineral)
|
Carl F. Auer von Welsbach
|
From the Greek neos for 'new' and 'didymos' for
twin after Carl Auer von Welsbach separated didymium into new elements, one
of which he called neodymium
|
|
61
|
promethium
|
Pm
|
1944
(synthesised)
|
Jacob A. Marinsky, Lawrence E. Glendenin,
Charles D. Coryell
|
From Prometheus who stole fire from heaven and
gave it to the human race, since it was found by harnessing nuclear energy
which is also a threat
|
|
62
|
samarium
|
Sm
|
1878
|
Marc Delafontaine
|
From the mineral Samarskite in which it is
found and which was named after Colonel von Samarski, a Russian mine official
|
|
63
|
europium
|
Eu
|
1896
(separation from mineral)
|
Eugene-Antole Demarcay
|
From the continent Europe. Demarcay isolated
europium in 1901
|
|
64
|
gadolinium
|
Gd
|
1880
|
Jean Charles Galissard de Marignac
|
From the mineral gadolinite in which it is
found and which was named after Johan Gadolin
|
|
65
|
terbium
|
Tb
|
1843
|
Carl Gustaf Mosander
|
From the village of Ytterby in Sweden where the
mineral ytterbite was first found
|
|
66
|
dysprosium
|
Dy
|
1886
|
Paul-Emile Lecoq de Boisbaudran
|
From the Greek dysprositos for 'hard to get at'
because it is difficult to separate dysprosium from the holmium mineral in
which it is found
|
|
67
|
holmium
|
Ho
|
1879
|
Per Theodor Cleve
|
From the Latin holmia for Stockholm, or
possibly after Holmberg who first isolated it.
|
|
68
|
erbium
|
Er
|
1843
|
Carl Gustaf Mosander
|
From the Swedish town of Ytterby where the ore
gadolinite was first mined.
|
|
69
|
thulium
|
Tm
|
1879
|
Per Theodor Cleve
|
From Thule, the earliest name for Scandanavia
|
|
70
|
ytterbium
|
Yb
|
1878
|
Jean Charles Galissard de Marignac
|
From the Swedish village of Ytterby where the
mineral ytterbite was found
|
|
71
|
lutetium
|
Lu
|
1907
|
Georges Urbain
|
From the Latin lutetia the Latin name for the
city of Paris
|
|
72
|
hafnium
|
Hf
|
1923
|
Dirk Coster, Charles de Hevesy
|
From the Latin hafnia for Copenhagen where it
was first discovered.
|
|
73
|
tantalum
|
Ta
|
1802
|
Anders Gustaf Ekeberg
|
From the Greek tantalos, the mythological
character who was banished to Hades unable to eat or drink, because the
element was insoluble in acids.
|
|
74
|
tungsten
|
W
|
1783
(isolated)
|
Don Juan Jose and Don Fausto d'Elhuyar
|
From the Swedish tung sten for 'heavy stone'.
The chemical symbol is derived from the German wolfram which was found with
tin and interferred with the smelting of tin, it was said to eat up tin like
a wolf eats up sheep
|
|
75
|
rhenium
|
Re
|
1925
|
Ida Tacke-Noddack, Walter Noddack, Otto Carl
Berg
|
From the Latin rhenus for the Rhine Ralley in
Germany
|
|
76
|
osmium
|
Os
|
1803
|
Smithson Tennant
|
From the Greek some for 'smell' because of the
sharp odour of the volatile oxide
|
|
77
|
iridium
|
Ir
|
1803
|
Smithson Tennant
|
From the Latin Iris, the Greek goddess of
rainbows because of the variety of colours in the element's salt solutions
|
|
78
|
platinum
|
Pt
|
1735
|
Antonio de Ulloa
|
From the Spanish platina for 'silver'
|
|
79
|
gold
|
Au
|
-
|
known since ancient times
|
From the Sanskrit jval 'to shine'. The symbol
Au derives from the Latin aurum for Aurora the Roman goddess of the dawn.
|
|
80
|
mercury
|
Hg
|
-
|
known since ancient times
|
From the Roman god Mercury, the messenger of
the gods. The symbol derives from the Greek hydragyrium for 'liquid silver'
or quick silver
|
|
81
|
thallium
|
Tl
|
1861
|
Sir William Crookes
|
From the Greek thallos for 'green shoot'
because of the bright green lines in its spectrum
|
|
82
|
lead
|
Pb
|
-
|
known since ancient times
|
From Anglo Saxon lead. The symbol is derived
from the Latin plumbum for 'lead'
|
|
83
|
bismuth
|
Bi
|
1753
|
Claude-Francois Geoffroy the Younger
|
From the German weisse masse for 'white mass',
the colour of its oxides
|
|
84
|
polonium
|
Po
|
1898
|
Pierre and Marie Curie
|
From Poland, the native country of Marie
Sklodowska Curie
|
|
85
|
astatine
|
At
|
1940
(synthesised)
|
Dale R. Carson, K.R. MacKenzie, Emilio Segre
|
From the Greek astatos for 'unstable' as it is
an unstable element.
|
|
86
|
radon
|
Rn
|
1900
|
Friedrich Ernst Dorn
|
Originally called radium emanation, Em, because
it was a decay product of radium. The name radon reflects its origin from
radium
|
|
87
|
francium
|
Fr
|
1939
|
Marguerite Catherine Perey
|
From France the country in which it was first
discovered
|
|
88
|
radium
|
Ra
|
1898
|
Marie Sklodowska Curie, Pierre Curie
|
From the Latin radius for 'beam or ray' because
of its ray-emitting power
|
|
89
|
actinium
|
Ac
|
1899
|
Andre-Louis Debierne
|
From the Greek aktis or akinis for 'beam or
ray' because it is a good source of alpha radiation
|
|
90
|
thorium
|
Th
|
1828
|
Jons Jacob Berzelius
|
From Thor, Scandanavian god of thunder
|
|
91
|
protactinium
|
Pa
|
1913
|
Kasimir Fajans, O.H. Gohring
|
From the Greek protos for 'first' and actinium,
since it was found to be the parent of actinium
|
|
92
|
uranium
|
U
|
1789
|
Martin Heinrich Klaproth
|
From the planet Uranus named after the Roman
'Father Heaven', Uranus was discovered in 1781.
|
|
93
|
neptunium
|
Np
|
1940
(synthesised)
|
Edwin M. McMillan, Philip H. Abelson
|
From Neptune, the Roman god of the sea, since
it is the next outermost planet beyond Uranus in the Solar System and this
element is the next one beyond Uranium in the Periodic Table
|
|
94
|
plutonium
|
Pu
|
1941
(synthesised)
|
Glenn T. Seaborg, Joseph W. Kennedy, Edward M.
McMillan, Arthur C. Wohl
|
From the planet Pluto, the Roman god of the
underworld, as Pluto is the next planet in the Solar System beyond Neptune
and the element plutonium is the next element beyond neptunium
|
|
95
|
americium
|
Am
|
1944
(synthesised)
|
Glenn T. Seaborg, Ralph A. James, Leon O.
Morgan, Albert Ghiorso
|
From the analogy to europium the sixth element
in the lanthanide series since americium is the sixth element in the actinide
series.
|
|
96
|
curium
|
Cm
|
1944
(synthesised)
|
Glenn T. Seaborg, Ralph A. James, Albert
Ghiorso
|
From 'Pierre and Marie Curie' who discovered
radium and polonium
|
|
97
|
berkelium
|
Bk
|
1949
(synthesised)
|
Glenn T. Seaborg, Stanley G. Thompson, Albert
Ghiorso
|
From Berkeley, California, where it was first
synthesised
|
|
98
|
californium
|
Cf
|
1950
(synthesised)
|
Stanley G. Thompson, Glenn T. Seaborg, Kenneth
Street, Jr., Albert Ghiorso
|
From the state and university of California
where the element was first synthesised.
|
|
99
|
einsteinium
|
Es
|
1952
(synthesised)
|
Albert Ghiorso
|
From 'Albert Einstein'. Eisteinium-252 first
found in the debris of thermonuclear weapons
|
|
100
|
fermium
|
Fm
|
1952
(synthesised)
|
Albert Ghiorso
|
From Enrico Fermi, the physicist who built the
first nuclear reactor. First found in the debris of a thermonuclear weapon
explosion
|
|
101
|
mendelevium
|
Md
|
1955
(synthesised)
|
Stanley G. Thompson, Glenn T. Seaborg, Barnard
G. Harvey, Gregory R. Choppin, Albert Ghiorso
|
From Dimitri Mendeleevwho developed the Periodic Table of the
Elements. Original chemical symbol was My but was changed in 1955.
|
|
102
|
nobelium
|
No
|
1958
(synthesised)
|
Albert Ghiorso, Glenn T. Seaborg, Torbjorn
Sikkeland, John R. Walton
|
From Alfred Nobel the discoverer of dynamite
and founder of the Nobel Prize
|
|
103
|
lawrencium
|
Lr
|
1961
(synthesised)
|
Albert Ghiorso, Torbjorn Sikkeland, Almon E.
Larsh, Robert M. Latimer
|
From Ernest O. Lawrence who developed the
cyclotron. The original symbol was Lw but was changed
|
|
104
|
rutherfordium
|
RE
|
1964/1969
(synthesised)
|
Russian Scientists at Dubna/Albert Ghiorso
|
From Ernest Rutherford who developed a theory
of radioactive transformations
|
|
105
|
dubnium
|
Db
|
1967/1970
(synthesised)
|
Russian Scientists in Dubna/Lawrence Berkeley
Laboratory
|
From the location of the Russian research
centre in Dubna
|
|
106
|
seaborgium
|
Sg
|
1974
(synthesised)
|
Albert Ghiorso
|
From Glenn Theodore Seaborg who led the team that first synthesised a
number of transuranic elements
|
|
107
|
bohrium
|
Bh
|
1981
(synthesised)
|
Centre for Heavy-Ion Research , Germany
|
From Neils Bohr who developed a theory of the
electronic structure of the atom
|
|
108
|
hassium
|
Hs
|
1984
(synthesised)
|
Peter Armbruster, Gottfried Munzenber
|
From the Latin hassia for the German state of
Hesse whose former capital was Darmstadt where the element was first
synthesised
|
|
109
|
meitnerium
|
Mt
|
1980
(synthesised)
|
Peter Armbruster, Gottfried Munzenber
|
From Lise Meitner who discovered protactinium
|
|
110
|
darmstadtium
|
Ds
|
1994
(synthesised)
|
Peter Armbruster, Gottfried Munzenber
|
From Darmstadt the region where the research
centre is located
|
|
111
|
roentgenium
|
Rg
|
1994
(synthesised)
|
multinational team of scientists at the Heavy
Ion Research Centre, Darmstadt, Germany
|
From Roentgen, discoverer of X-rays
|
|
112
|
copernicium
|
Cn
|
1996
(synthesised)
|
multinational team of scientists at the Heavy
Ion Research Centre, Darmstadt, Germany
|
name proposed in 2009, the International Year
of Astronomy, after Nicolaus Copernicus who postulated that the Earth orbits
the Sun
|
|
114
|
-
|
-
|
1998
(synthesised)
|
multinational team of scientists at the Joint
Institute for Nuclear Research, Dubna, Russia
|
No name recorded
|
|
116
|
-
|
-
|
2000
(synthesised)
|
multinational team of scientists at the Joint
Institute for Nuclear Research, Dubna, Russia
|
No name recorded
|
سلام
من ممنونم
سلام
ما که همیشه هستیم فقط رد نمیشیم؛ درستش کردم، قبلش!!!!
سلام
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سلام
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