The periodic table is an arrangement of the chemical elements, structured by their atomic number, electron configuration and recurring chemical properties. In the basic form, elements are presented in ...

In chemistry, a group is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table; the 14 f-block columns, between groups 2 and 3, are ...

1.1. Mendeleev - States that when elements are arranged according to their atomic numbers, elements with similar properties appear at regular intervals. 9.1.1. Valence electrons are found in the ...

A global research collaboration, including scientists from the University of Liverpool, has provided new insights into superheavy elements by exami ...

A set of powerful development kit: JSON, task management, numerals, chemistry, etc.

{"version":3,"sources":["nearest-periodic-value.js"],"names":[],"mappings":"AAAA,AAAC,CAAA,UAAU,QAAQ,SAAS;AAC1B,SAAO,YAAY,YAAY,OAAO,WAAW,cAAc,OAAO,UAAU,YAChF,OAAO ...

Players read questions about energy levels and score points by picking the correct element as the answer. Electrons are in regions around the nucleus that are different distances away from the nucleus ...

These are almost one-quarter of the periodic table and are mainly found in the first four periods. Of these, 11 are essential elements that our bodies need in larger amounts: oxygen, carbon ...

Stephen Flynn has been accused of showing disrespect to Britain's war dead by refusing to sing the national anthem during the Remembrance Sunday service at the Cenotaph ...

The Princess of Wales watched the service from the balcony of the Foreign Office.

Denmark is a founding member of the European Space Agency and on Wednesday formally committed to safe and responsible space ...

More than two decades after spotting a mysterious, gelatinous, bioluminescent creature swimming in the deep sea, California ...