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Like the periodic table, the list below organizes the elements by the number of protons in their atoms; it can also be organized by other properties, such as atomic weight, density, and electronegativity. For more detailed information about the origins of element names, see List of chemical element name etymologies.
Sporcle has three types of multiplayer activities: Showdowns, [22] Live 5, [23] and Trivia Bingo. [24] In showdowns, users go head to head with other Sporcle users to answer as many questions on a quiz before the other user can answer the same questions. On Live 5, users are given five questions and they have four options to choose from on each ...
JetPunk is an online trivia and quizzing website. The service offers a variety of quizzes in different topics, such as geography, history, science, literature, and music. [2] [3] The site offers quizzes in a variety of languages, including but not limited to: English, French, Spanish, Dutch, Italian, German, Finnish, Portuguese, and Polish. [4]
The periodic table and law are now a central and indispensable part of modern chemistry. The periodic table continues to evolve with the progress of science. In nature, only elements up to atomic number 94 exist; [a] to go further, it was necessary to synthesize new elements in the laboratory.
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1914 — Hackh's periodic table: First spiral to take account of Mosley's atomic numbers, and the first to show successively larger pairs of coils. Also interesting as H stands alone in the centre [77] 1925 — Courtines's a model of the periodic table: A helix with the appearance of a submarine or a castle [78]
A period on the periodic table is a row of chemical elements. All elements in a row have the same number of electron shells. Each next element in a period has one more proton and is less metallic than its predecessor. Arranged this way, elements in the same group (column) have similar chemical and physical properties, reflecting the periodic law.
This is an accepted version of this page This is the latest accepted revision, reviewed on 17 November 2024. Development of the table of chemical elements The American chemist Glenn T. Seaborg —after whom the element seaborgium is named—standing in front of a periodic table, May 19, 1950 Part of a series on the Periodic table Periodic table forms 18-column 32-column Alternative and ...