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The 118 element videos and introduction videos were all shot unscripted in June and July 2008. [5] Since the initial videos were completed in 2008 the team has been refining and uploading revised versions of the videos with new video and in higher resolutions. [5] A key example of this revising is with the xenon video that was redone in honour ...
Carbon is a constituent (about 12% by mass) of the very large masses of carbonate rock (limestone, dolomite, marble, and others). Coal is very rich in carbon (anthracite contains 92–98%) [64] and is the largest commercial source of mineral carbon, accounting for 4,000 gigatonnes or 80% of fossil fuel. [65]
A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). [ 1 ] The definitive visualisation of all 118 elements is the periodic table of the elements , whose history along the principles of the periodic law was one of the founding ...
Pocket Rockers was a brand of personal stereo produced by Fisher-Price in the late 1980s, aimed at elementary school-age children. [1] They played a proprietary variety of miniature cassette (appearing to be a smaller version of the 8-track tape) which was released only by Fisher-Price themselves.
Of the 94 natural elements, eighty have a stable isotope and one more has an almost-stable isotope (with a half-life of 2.01×10 19 years, over a billion times the age of the universe). [15] [b] Two more, thorium and uranium, have isotopes undergoing radioactive decay with a half-life comparable to the age of the Earth.
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YouTube Music is a music streaming service developed by the American video platform YouTube, a subsidiary of Alphabet's Google. The service is designed with an interface that allows users to simultaneously explore music audios and music videos from YouTube-based genres, playlists and recommendations.
This named isotope later became the official name for element 90. ThA: Thorium A: 84: From thorium and A. Placeholder name given at one time to 216 Po, an isotope of polonium identified in the decay chain of thorium. ThB: Thorium B: 82: From thorium and B. Placeholder name given at one time to 212 Pb, an isotope of lead identified in the decay ...