scholarly journals Role of the periodic table in discovery of new elements

2011 ◽  
Vol 1 (1) ◽  
pp. 1-5 ◽  
Author(s):  
D.C. Hoffman
Keyword(s):  
Periodic Table ◽  
Predictive Power ◽  
Chemical Elements ◽  
Chemical Properties ◽  
Negative Effects ◽  
Current Form ◽  
Future Role ◽  
History Of ◽  
Chemical Techniques

AbstractThis year (2009) marks the 140th Anniversary of Mendeleev's original 1869 periodic table of the elements based on atomic weights. It also marks the 175th anniversary of his birth in Tolbosk, Siberia. The history of the development of periodic tables of the chemical elements is briefly reviewed beginning with the presentation by Dmitri Mendeleev and his associate Nikolai Menshutkin of their original 1869 table based on atomic weights. The value, as well as the sometimes negative effects, of periodic tables in guiding the discovery of new elements based on their predicted chemical properties is assessed. It is noteworthy that the element with Z=101 (mendelevium) was identified in 1955 using chemical techniques. The discoverers proposed the name mendelevium to honor the predictive power of the Mendeleev Periodic Table. Mendelevium still remains the heaviest element to have been identified first by chemical rather than nuclear or physical techniques. The question concerning whether there will be a future role for the current form of the periodic table in predicting chemical properties and aid in the identification of elements beyond those currently known is considered.

Viatscheslaw Romanoff: unknown genius of the periodic system

2019 ◽  
Vol 91 (12) ◽  
pp. 1921-1928 ◽  
Author(s):  
Mikhail Kurushkin
Keyword(s):  
Periodic System ◽  
Periodic Table ◽  
Precious Metal ◽  
Chemical Elements ◽  
Noble Gas ◽  
Chemical Properties ◽  
Correct Placement ◽  
History Of ◽  
Actinide Series ◽  
And Chemical Properties

Abstract The history of chemistry has not once seen representations of the periodic system that have not received proper attention or recognition. The present paper is dedicated to a nearly unknown version of the periodic table published on the occasion of the centenary celebration of Mendeleev’s birth (1934) by V. Romanoff. His periodic table visually merges Werner’s and Janet’s periodic tables and it is essentially the spiral periodic system on a plane. In his 1934 paper, Romanoff was the first one to introduce the idea of the actinide series, a decade before Glenn T. Seaborg, the renowned creator of the actinide concept. As a consequence, another most outstanding thing about Romanoff’s paper occurs towards its very end: he essentially predicted the discovery of elements #106, #111 and #118. He theorized that, had uranium not been the “creative limit”, we would have met element #106, a “legal” member of group 6, element #111, a precious metal, “super-gold” and element #118, a noble gas. In 2019, we take it for granted that elements #106, #111 and #118 indeed exist and they are best known as seaborgium, roentgenium and oganesson. It is fair to say that Romanoff’s success with the prediction of correct placement and chemical properties of seaborgium, roentgenium and oganesson was only made possible due to the introduction of an early version of the actinide series that only had four elements at that time. Sadly, while Professor Romanoff was imprisoned (1938–1943), two new elements, neptunium (element #93) and plutonium (element #94) were discovered. While Professor Romanoff was in exile in Ufa (1943–1953), six further elements were added to the periodic table: americium (element #95), curium (element #96), berkelium (element #97), californium (element #98), einsteinium (element #99) and fermium (element #100). The next year after his death, in 1955, mendelevium (element #101), was discovered. Romanoff’s version of the periodic table is an unparalleled precursor to the contemporary periodic table, and is an example of extraordinary anticipation of the discovery of new chemical elements.

scholarly journals IUPAC Periodic Table Challenge

2020 ◽  
Vol 42 (2) ◽  
pp. 18-21
Author(s):  
Juris Meija ◽  
Javier Garcia-Martinez ◽  
Jan Apotheker
Keyword(s):  
General Public ◽  
Periodic Table ◽  
Chemical Elements ◽  
Global Competition ◽  
Daily Lives ◽  
The World

AbstractIn 2019, the world celebrated the International Year of the Periodic Table of Chemical Elements (IYPT2019) and the IUPAC centenary. This happy coincidence offered a unique opportunity to reflect on the value and work that is carried out by IUPAC in a range of activities, including chemistry awareness, appreciation, and education. Although IUPAC curates the Periodic Table and oversees regular additions and changes, this icon of science belongs to the world. With this in mind, we wanted to create an opportunity for students and the general public to participate in this global celebration. The objective was to create an online global competition centered on the Periodic Table and IUPAC to raise awareness of the importance of chemistry in our daily lives, the richness of the chemical elements, and the key role of IUPAC in promoting chemistry worldwide. The Periodic Table Challenge was the result of this effort.

HYPOTHESIS ON THE SYNERGISM OF RADIATION AND WATER FILTERS IN THE FORMATION OF BIOOBJECTS

2019 ◽  
Vol 21 (1) ◽  
pp. 53-58
Author(s):  
B.L. Oksengendler ◽  
S.E. Maksimov ◽  
S.U. Norbaev ◽  
L.Yu. Akopyan ◽  
M.V. Konoplyova ◽  
...  
Keyword(s):  
Periodic Table ◽  
Chemical Elements ◽  
Electron Shell ◽  
Living Matter ◽  
Heavy Atoms ◽  
The Third ◽  
Water Filters ◽  
Selection Of ◽  
Electron Shells

The article contains a hypothesis on the dominance of chemical elements of top periods of the Periodic Table in living matter. The idea is that the elements of the third and next periods of the table, in contrast to the first two periods, have larger number of subvalent electron shells. Because of this, ionization of the k-electron shell by radiation (kosmic and terrestrial) in the heavy atoms always leads to the Auger cascade, which causes the destruction of molecular chains. This mechanism can play a role of the radiation filter in the selection of light chemical elements in living matter in addition to the mechanism of hydrolytic filter (G.R. Ivanitskii).

scholarly journals The International Year of the Periodic Table 2019

2019 ◽  
Vol 41 (1) ◽  
pp. 2-5 ◽  
Author(s):  
Jan Reedijk ◽  
Natalia Tarasova
Keyword(s):  
Periodic Table ◽  
Chemical Elements ◽  
History Of

Abstract This year we celebrate the Periodic Table of Chemical Elements in the format proposed by Mendeleev in 1869, and its continued development to this day. This issue of CI describes several aspects of the Periodic Table, its history and celebration, and also addresses the pathways to possible new elements. In this preface we address some highlights of the papers and pay attention to the history of events that have led to IYPT2019.

Scotland, Malawi and Medicine: Livingstone's Legacy, I Presume? An Historical Perspective.

2007 ◽  
Vol 52 (3) ◽  
pp. 36-44
Author(s):  
John Lwanda
Keyword(s):  
Medical History ◽  
Historical Perspective ◽  
Medical Training ◽  
Medical Services ◽  
Future Role ◽  
The Past ◽  
History Of

In this personal short historical perspective I reflect on aspects of the medical history of Malawi, formerly Nyasaland, highlighting the role of Scotland and its people in the development of the Malawi medical services in both the colonial as well as the postcolonial period which began in 1964. The paper, after discussing the history of medical training in Malawi and current constraints and challenges, goes on to make some suggestions - based on historical lessons - about future role of Scottish involvement in Malawi's medical development. It would be unfortunate if, in a rush to ‘help or do something’ the mistakes of the past are repeated.

scholarly journals UNESCO Leading Role in the Celebration of the International Year of the Periodic Table of Chemical Elements (IYPT-2019)

Vestnik RFFI ◽  
2019 ◽  
pp. 43-53
Author(s):  
Natalya A. Tsivadze
Keyword(s):  
Sustainable Development ◽  
United Nations ◽  
Periodic Table ◽  
Chemical Elements ◽  
Government Officials ◽  
Leading Role ◽  
United Nations General ◽  
General Assembly Resolution ◽  
The United Nations

In accordance with United Nations General Assembly resolution, the year 2019 was proclaimed the International Year of the Periodic Table of Chemical Elements, and the United Nations Educational, Scientific and Cultural Organization (UNESCO) was designated as the lead organization for its implementation. At the present day, the UNESCO is the largest UN specialized agency with broad competence in providing interstate collaboration in the area of science, capable of playing a unique role for promotion of peace and sustainable development. The establishment of UN observances stimulates interest in the activities and programs of the organization in these areas, and also contributes to the intensification of activities at the international level. The proclamation of 2019 as the International Year of the Periodic Table is a recognition of the important role of the basic sciences, in particular, achievements in the field of chemistry and physics, in addressing the numerous development challenges that the world is currently facing in implementing the United Nations “2030 Agenda for Sustainable Development”. The International Year under the auspices of UNESCO provides an opportunity to mobilize all interested parties around the topic of science for peace and development – from government officials to media representatives and schoolchildren.

scholarly journals Current and future role of immobilized enzymes in medical field

2021 ◽  
Vol 5 (01) ◽  
pp. 1-9
Author(s):  
Mohammad Rafiq Khan
Keyword(s):  
Immobilized Enzymes ◽  
Review Of The Literature ◽  
Research Groups ◽  
Medical Field ◽  
Future Role ◽  
Current Classification ◽  
Current Century ◽  
History Of

Although the history of immobilized enzymes and their applications in different fields are traced back to the second half of the twentieth century, their importance in bioreactors and biosensors highlighted at the turn of the current century is under active consideration in these days for broad-spectrum applications in different medical fields. Thus, this article presents a review of the literature concerning the current and future role of the immobilized enzymes in different medical fields. As the author and his supervised research groups have also been actively involved in research on immobilized enzymes, he has also made some input with a recommendation to revise the current classification of immobilized enzymes basically into “Naturally Immobilized” and “Artificially Immobilized Enzymes”, keeping the sub-classification intact. He has also suggested the development of some medical products based on the results of his research groups.

scholarly journals Understanding Periodic and Non-periodic Chemistry in Periodic Tables

2021 ◽  
Vol 8 ◽  
Author(s):  
Changsu Cao ◽  
René E. Vernon ◽  
W. H. Eugen Schwarz ◽  
Jun Li
Keyword(s):  
Periodic Table ◽  
Chemical Elements ◽  
Chemical Properties ◽  
Physical Vacuum ◽  
Eyes Open ◽  
The Common ◽  
Nuanced Understanding ◽  
Chemical Conditions ◽  
Aesthetic Concepts ◽  
Secondary Periodicity

The chemical elements are the “conserved principles” or “kernels” of chemistry that are retained when substances are altered. Comprehensive overviews of the chemistry of the elements and their compounds are needed in chemical science. To this end, a graphical display of the chemical properties of the elements, in the form of a Periodic Table, is the helpful tool. Such tables have been designed with the aim of either classifying real chemical substances or emphasizing formal and aesthetic concepts. Simplified, artistic, or economic tables are relevant to educational and cultural fields, while practicing chemists profit more from “chemical tables of chemical elements.” Such tables should incorporate four aspects: (i) typical valence electron configurations of bonded atoms in chemical compounds (instead of the common but chemically atypical ground states of free atoms in physical vacuum); (ii) at least three basic chemical properties (valence number, size, and energy of the valence shells), their joint variation across the elements showing principal and secondary periodicity; (iii) elements in which the (sp)8, (d)10, and (f)14valence shells become closed and inert under ambient chemical conditions, thereby determining the “fix-points” of chemical periodicity; (iv)peculiar elements at the top and at the bottom of the Periodic Table. While it is essential that Periodic Tables display important trends in element chemistry we need to keep our eyes open for unexpected chemical behavior in ambient, near ambient, or unusual conditions. The combination of experimental data and theoretical insight supports a more nuanced understanding of complex periodic trends and non-periodic phenomena.

THE EXPERIENCE OF TEACHING ENGLISH SPECIAL LEXIS FOR THE MULTILINGUAL GROUPS OF CHEMICAL DEPARTMENTS (BASED ON THE ONOMASTICS OF D.I. MENDELEYEV'S PERIODIC TABLE)

2020 ◽  
Author(s):  
R. S. Islamov
Keyword(s):  
Special Interest ◽  
Periodic Table ◽  
Chemical Elements ◽  
The Other ◽  
Teaching English ◽  
Language Teacher ◽  
Chemistry Students ◽  
History Of ◽  
Approach To Teaching ◽  
The One

The paper observes the matter of proper names of chemical elements of the periodic table by D.I. Mendeleev, the history of their origin, and transformation while the morphemic and semantic loaning from Greek and Latin languages. Moreover, the name for this lexis is proposed as stoichonyms. The topic under discussion is actual for chemistry students in classes of English. The paper provides an example of multilingual group of the speakers of Russian, Tajik, and Kyrgyz languages. The special interest is the comparative lexemic analysis of the names of chemical elements in these three languages. By means of it, one can conclude on the students' perception of the scientific lexis in the light of its etymology, on the one hand. On the other hand, one can make an approach to teaching the special lexis not only by language teacher but chemistry as well.

Heavy, Superheavy . . . Quo Vadis?

2018 ◽  
Author(s):  
Paul J. Karol
Keyword(s):  
Atomic Number ◽  
Periodic Table ◽  
Chemical Element ◽  
Chemical Elements ◽  
Chemical Properties ◽  
Superheavy Element ◽  
Electron Shell ◽  
Heavy Elements ◽  
Quo Vadis ◽  
Definition Of

Uranium was Discovered in 1789 by the German chemist Martin Heinrich Klaproth in pitchblende ore from Joachimsthal, a town now in the Czech Republic. Nearly a century later, the Russian chemist Dmitri Mendeleev placed uranium at the end of his periodic table of the chemical elements. A century ago, Moseley used x-ray spectroscopy to set the atomic number of uranium at 92, making it the heaviest element known at the time. This chapter will deal with the quest to explore that limit and heavy and superheavy elements, and provide an update on where continuation of the periodic table is headed and some of the significant changes in its appearance and interpretation that may be necessary. Our use of the term “heavy elements” differs from that of astrophysicists who refer to elements above helium as heavy elements. The meaning of the term “superheavy” element is still not exactly agreed upon and has changed over the past several decades. “Ultraheavy” is occasionally used. Interestingly, there is no formal definition of “periodic table” by the International Union of Pure and Applied Chemistry (IUPAC) in their glossary of definitions: the “Gold Book.” But there are plenty of definitions in the general literature—including Wikipedia, the collaborative, free, internet encyclopedia which calls the “periodic table” a “tabular arrangement of the chemical elements, organized on the basis of their atomic numbers, electron configurations (electron shell model), and recurring chemical properties. Elements are presented in order of increasing atomic number (the number of protons in the nucleus).” IUPAC’s first definition of a “chemical element” is: “A species of atoms; all atoms with the same number of protons in the atomic nucleus.” Their definition of atom: “the smallest particle still characterizing a chemical element. It consists of a nucleus of positive charge (Z is the proton number and e the elementary charge) carrying almost all its mass (more than 99.9%) and Z electrons determining its size.”

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