'''Kimyoviy unsur''' ('''kimyoviy element''') - bir xil zaryadli yoki [[atom raqam]]li [[atom]]lar majmui. Bugungi kunga kelib ([[20062011]]), unsurlar soni 118 taga yetgan.<ref name="Oganessian2010">{{cite journal|doi=10.1103/PhysRevLett.104.142502|title=Synthesis of a New Element with Atomic Number Z=117|author=Yu. Ts. Oganessian|publisher=Physical Review Letter|volume=104|issue=14|edition=142502|year=2010|last2=Abdullin|first2=F. Sh.|last3=Bailey|first3=P. D.|last4=Benker|first4=D. E.|last5=Bennett|first5=M. E.|last6=Dmitriev|first6=S. N.|last7=Ezold|first7=J. G.|last8=Hamilton|first8=J. H.|last9=Henderson|first9=R. A.|journal=Physical Review Letters|pmid=20481935|bibcode = 2010PhRvL.104n2502O|pages=142502 }}</ref> Ulardan 25 tasi sunʻiy yoʻl bilan ([[yadroviy reaksiya]] yordamida) hosil qilingan.
