Периодичната таблица на химичните елементи: история и съвременно състояние
The Periodic Table of Chemical Elements: Its History and Its Up-To-Date Status
Author(s): Ivan L. DukovSubject(s): Social Sciences, Education, School education, Vocational Education, Adult Education, Higher Education , History of Education, State/Government and Education, Inclusive Education / Inclusion
Published by: Национално издателство за образование и наука „Аз-буки“
Keywords: D. I. Mendeleev; new elements; periodic table; IUPAC
Summary/Abstract: The history and the up-to-date status of the periodic table of the chemical elements are both examined. Only Mendeleev has been able to predict existence of new elements as well as to determine their chemical and physical characteristics. Later Antonius van den Broek and Henry Moseley have found that the chemical elements have been arranged in the Periodic Table according to their atomic number, not to their atomic mass as was the Mendeleev’s statement. The determination of the electronic configuration of the atoms has shown that the periodical change of the properties of the elements is due to the periodical change of their electronic configuration. The role of the IUPAC in the updating of the Periodic Table has been commented, as well.
Journal: Химия. Природните науки в образованието
- Issue Year: 28/2019
- Issue No: 2
- Page Range: 257-273
- Page Count: 7
- Language: Bulgarian
- Content File-PDF