The Periodic Table of Elements

The Periodic Table of Elements

1 2 6 Atomic Number = Number of Protons = Number of Electrons

HYDROGENH HELIUMHe 1 Chemical Symbol NON-METALS 4 3 4 C 5 6 7 8 9 10 Li Be CARBON Chemical Name B C N O F Ne LITHIUM BERYLLIUM = Number of Protons + Number of Neutrons* BORON CARBON NITROGEN OXYGEN FLUORINE NEON 7 9 12 Atomic Weight 11 12 14 16 19 20 11 12 13 14 15 16 17 18

SODIUMNa MAGNESIUMMg ALUMINUMAl SILICONSi PHOSPHORUSP SULFURS CHLORINECl ARGONAr 23 24 METALS 27 28 31 32 35 40 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

POTASSIUMK CALCIUMCa SCANDIUMSc TITANIUMTi VANADIUMV CHROMIUMCr MANGANESEMn FeIRON COBALTCo NICKELNi CuCOPPER ZnZINC GALLIUMGa GERMANIUMGe ARSENICAs SELENIUMSe BROMINEBr KRYPTONKr 39 40 45 48 51 52 55 56 59 59 64 65 70 73 75 79 80 84 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54

RUBIDIUMRb STRONTIUMSr YTTRIUMY ZIRCONIUMZr NIOBIUMNb MOLYBDENUMMo TECHNETIUMTc RUTHENIUMRu RHODIUMRh PALLADIUMPd AgSILVER CADMIUMCd INDIUMIn SnTIN ANTIMONYSb TELLURIUMTe IODINEI XeXENON 85 88 89 91 93 96 98 101 103 106 108 112 115 119 122 128 127 131 55 56 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86

CESIUMCs BARIUMBa HAFNIUMHf TANTALUMTa TUNGSTENW RHENIUMRe OSMIUMOs IRIDIUMIr PLATINUMPt AuGOLD MERCURYHg THALLIUMTl PbLEAD BISMUTHBi POLONIUMPo ASTATINEAt RnRADON 133 137 178 181 184 186 190 192 195 197 201 204 207 209 209 210 222 87 88 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118

FRANCIUMFr RADIUMRa RUTHERFORDIUMRf DUBNIUMDb SEABORGIUMSg BOHRIUMBh HASSIUMHs MEITNERIUMMt DARMSTADTIUMDs ROENTGENIUMRg COPERNICIUMCn NIHONIUMNh FLEROVIUMFl MOSCOVIUMMc LIVERMORIUMLv TENNESSINETs OGANESSONOg 223 226 263 268 271 270 270 278 281 281 285 286 289 289 293 294 294

57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 KEY

= Solid at room temperature LANTHANUMLa CERIUMCe PRASEODYMIUMPr NEODYMIUMNd PROMETHIUMPm SAMARIUMSm EUROPIUMEu GADOLINIUMGd TERBIUMTb DYSPROSIUMDy HOLMIUMHo ERBIUMEr THULIUMTm YTTERBIUMYbYb LUTETIUMLu 139 140 141 144 145 150 152 157 159 163 165 167 169 173 175 = Liquid at room temperature = Gas at room temperature 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 = Radioactive ACTINIUMAc THORIUMTh PROTACTINIUMPa URANIUMU NEPTUNIUMNp PLUTONIUMPu AMERICIUMAm CmCURIUM BERKELIUMBk CALIFORNIUMCf EINSTEINIUMEs FERMIUMFm MENDELEVIUMMd NOBELIUMNo LAWRENCIUMLr = Artificially Made 227 232 231 238 237 244 243 247 247 251 252 257 258 259 262 * The atomic weights listed on this Table of Elements have been rounded to the nearest whole number. As a result, this chart actually displays the mass number of a specific isotope for each element. An element's complete, unrounded atomic weight can be found on the It's Elemental website: http://education.jlab.org/itselemental/

http://education.jlab.org/ Last revised on June 8, 2016