1 To 20 Atomic Number



Here is a list of the elements sorted by atomic number.

Start studying Periodic Table of Elements 1-20 atomic numbers. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

1 to 20 atomic numberNumber
Element nameElement symbolAtomic number
HydrogenH1
HeliumHe2
LithiumLi3
BerylliumBe4
BoronB5
CarbonC6
NitrogenN7
OxygenO8
FluorineF9
NeonNe10
SodiumNa11
MagnesiumMg12
AluminiumAl13
SiliconSi14
PhosphorusP15
SulfurS16
ChlorineCl17
ArgonAr18
PotassiumK19
CalciumCa20
ScandiumSc21
TitaniumTi22
VanadiumV23
ChromiumCr24
ManganeseMn25
IronFe26
CobaltCo27
NickelNi28
CopperCu29
ZincZn30
GalliumGa31
GermaniumGe32
ArsenicAs33
SeleniumSe34
BromineBr35
KryptonKr36
RubidiumRb37
StrontiumSr38
YttriumY39
ZirconiumZr40
NiobiumNb41
MolybdenumMo42
TechnetiumTc43
RutheniumRu44
RhodiumRh45
PalladiumPd46
SilverAg47
CadmiumCd48
IndiumIn49
TinSn50
AntimonySb51
TelluriumTe52
IodineI53
XenonXe54
CaesiumCs55
BariumBa56
LanthanumLa57
CeriumCe58
PraseodymiumPr59
NeodymiumNd60
PromethiumPm61
SamariumSm62
EuropiumEu63
GadoliniumGd64
TerbiumTb65
DysprosiumDy66
HolmiumHo67
ErbiumEr68
ThuliumTm69
YtterbiumYb70
LutetiumLu71
HafniumHf72
TantalumTa73
TungstenW74
RheniumRe75
OsmiumOs76
IridiumIr77
PlatinumPt78
GoldAu79
MercuryHg80
ThalliumTl81
LeadPb82
BismuthBi83
PoloniumPo84
AstatineAt85
RadonRn86
FranciumFr87
RadiumRa88
ActiniumAc89
ThoriumTh90
ProtactiniumPa91
UraniumU92
NeptuniumNp93
PlutoniumPu94
AmericiumAm95
CuriumCm96
BerkeliumBk97
CaliforniumCf98
EinsteiniumEs99
FermiumFm100
MendeleviumMd101
NobeliumNo102
LawrenciumLr103
RutherfordiumRf104
DubniumDb105
SeaborgiumSg106
BohriumBh107
HassiumHs108
MeitneriumMt109
DarmstadtiumDs110
RoentgeniumRg111
CoperniciumCn112
UnuntriumUut113
FleroviumFl114
UnunpentiumUup115
LivermoriumLv116
UnunseptiumUus117
UnunoctiumUuo118

1 To 20 Atomic Number With Valency

List of first 50 elements of the periodic table by atomic number including the chemical symbol and the atomic weight. You can print the list of elements by hitting the print button below.

1 To 20 Atomic Number
  1. Start studying Periodic Table of Elements 1-20 atomic numbers. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
  2. This is a list of the 118 chemical elements which have been identified as of 2021. A chemical element, often simply called an element, is a species of atoms which all have the same number of protons in their atomic nuclei (i.e., the same atomic number, or Z).
  3. Chemical elements listed by atomic number The elemenents of the periodic table sorted by atomic number. Click on any element's name for further chemical properties, environmental data or health effects. This list contains the 118 elements of chemistry.
  4. As of 2021, all elements with atomic numbers 1 to 118 have been observed. Synthesis of new elements is accomplished by bombarding target atoms of heavy elements with ions, such that the sum of the atomic numbers of the target and ion elements equals the atomic number of the element being created.
Periodic table elements atomic number

1 To 20 Atomic Numbers

Atomic NumberChemical SymbolElement NameAtomic Weight (u)
1HHydrogen1.008
2HeHelium4.002602
3LiLithium6.94
4BeBeryllium9.0121831
5BBoron10.81
6CCarbon12.011
7NNitrogen14.007
8OOxygen15.999
9FFluorine18.99840316
10NeNeon20.1797
11NaSodium22.98976928
12MgMagnesium24.305
13AlAluminium26.9815385
14SiSilicon28.085
15PPhosphorus30.973762
16SSulfur32.06
17ClChlorine35.45
18ArArgon39.948
19KPotassium39.0983
20CaCalcium40.078
21ScScandium44.955908
22TiTitanium47.867
23VVanadium50.9415
24CrChromium51.9961
25MnManganese54.938044
26FeIron55.845
27CoCobalt58.933194
28NiNickel58.6934
29CuCopper63.546
30ZnZinc65.38
31GaGallium69.723
32GeGermanium72.63
33AsArsenic74.921595
34SeSelenium78.971
35BrBromine79.904
36KrKrypton83.798
37RbRubidium85.4678
38SrStrontium87.62
39YYttrium88.90584
40ZrZirconium91.224
41NbNiobium92.90637
42MoMolybdenum95.95
43TcTechnetium98
44RuRuthenium101.07
45RhRhodium102.9055
46PdPalladium106.42
47AgSilver107.8682
48CdCadmium112.414
49InIndium114.818
50SnTin118.71