Baris ketujuh juga sejalan dengan baris keenam: 7s mengisi, lalu 5f, lalu 6d, dan akhirnya 7p, dengan beberapa anomali di sepanjang jalan.<ref name="Petrucci331">Petrucci et al., p. 331</ref> Untuk waktu yang sangat lama, baris ketujuh tidak lengkap karena sebagian besar elemennya tidak terjadi di alam. Unsur-unsur yang hilang [[Unsur transuranium|setelah uranium]] mulai disintesis di laboratorium pada tahun 1940, ketika [[neptunium]] dibuat.<ref>Scerri, name="Scerri354"p. 354–6</ref> Baris ini selesai dengan penyintetisan [[tenesin]] pada tahun 2010<ref name="117s">{{cite journal |last1=Oganessian |first1=Yu.Ts. |author-link1=Yuri Oganessian |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. |first10=M.G. |last10=Itkis |first11=Yuri V. |last11=Lobanov |first12=A.N. |last12=Mezentsev |first13=K. J. |last13=Moody |first14=S.L. |last14=Nelson |first15=A.N. |last15=Polyakov |first16=C.E. |last16=Porter |first17=A.V. |last17=Ramayya |first18=F.D. |last18=Riley |first19=J.B. |last19=Roberto |first20=M. A. |last20=Ryabinin |first21=K.P. |last21=Rykaczewski |first22=R.N. |last22=Sagaidak |first23=D.A. |last23=Shaughnessy |first24=I.V. |last24=Shirokovsky |first25=M.A. |last25=Stoyer |first26=V.G. |last26=Subbotin |first27=R. |last27=Sudowe |first28=A.M. |last28=Sukhov |first29=Yu.S. |last29=Tsyganov |first30=Vladimir K. |last30=Utyonkov |first31=A.A. |last31=Voinov |first32=G.K. |last32=Vostokin |first33=P.A. |last33=Wilk |display-authors=6 |title=Synthesis of a new element with atomic number {{nowrap|{{mvar|Z}} {{=}} 117}} |year=2010 |journal=Physical Review Letters |volume=104 |issue=14 |page=142502 |doi=10.1103/PhysRevLett.104.142502 |pmid=20481935 |bibcode=2010PhRvL.104n2502O |s2cid=3263480 |url=https://semanticscholar.org/paper/ec9412add23e66f34b6bf51ebd7332278af413fc |access-date=12 Juni 2022 |archive-date=19 Oktober 2021 |archive-url=https://web.archive.org/web/20211019202231/https://www.semanticscholar.org/paper/Synthesis-of-a-new-element-with-atomic-number-Z-%3D-Oganessian-Abdullin/ec9412add23e66f34b6bf51ebd7332278af413fc |url-status=live }}</ref> (elemen terakhir, [[oganeson]], telah dibuat pada tahun 2002),<ref name="pp2002">{{cite journal|author=Oganessian, Yu. T.|display-authors=etal|title=Results from the first {{chem|249|Cf}}+{{chem|48|Ca}} experiment|url=http://www.jinr.ru/publish/Preprints/2002/287(D7-2002-287)e.pdf|journal=JINR Communication|date=2002|access-date=12 Juni 2022|archive-date=13 Desember 2004|archive-url=https://web.archive.org/web/20041213100709/http://www.jinr.ru/publish/Preprints/2002/287%28D7-2002-287%29e.pdf|url-status=dead}}</ref> dan elemen terakhir pada baris ketujuh ini divalidasi dan diberi nama pada tahun 2016.<ref name="IUPAC-20161130">{{cite news |author=Staff |title=IUPAC Announces the Names of the Elements 113, 115, 117, and 118 |url=https://iupac.org/iupac-announces-the-names-of-the-elements-113-115-117-and-118/ |date=30 November 2016 |work=[[IUPAC]] |access-date=12 Juni 2022 |archive-date=30 November 2016 |archive-url=https://web.archive.org/web/20161130111959/https://iupac.org/iupac-announces-the-names-of-the-elements-113-115-117-and-118/ |url-status=live }}</ref>
