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To round a number to n significant figures: [8] [9] If the n + 1 digit is greater than 5 or is 5 followed by other non-zero digits, add 1 to the n digit. For example, if we want to round 1.2459 to 3 significant figures, then this step results in 1.25.
Periodic Videos (also known as The Periodic Table of Videos) is a video project and YouTube channel on chemistry.It consists of a series of videos about chemical elements and the periodic table, with additional videos on other topics in chemistry and related fields.
Braun had been making videos, mainly tutorials, for fun since his teenage years, creating a YouTube channel on March 10, 2014. His first video was uploaded on March 24, 2014, and many of his early videos were recordings of his projects as a laboratory technician or at his parents' garage, with them later being filmed at his industrial-grade laboratory. [3]
The first X-ray diffraction experiment was conducted in 1912 by Max von Laue, [7] while electron diffraction was first realized in 1927 in the Davisson–Germer experiment [8] and parallel work by George Paget Thomson and Alexander Reid. [9] These developed into the two main branches of crystallography, X-ray crystallography and electron ...
The arrow pushing method is used in some of the steps to show where electron pairs go. A chain reaction is an example of a complex mechanism, in which the propagation steps form a closed cycle. In a chain reaction, the intermediate produced in one step generates an intermediate in another step. Intermediates are called chain carriers.
In chemistry, the terrace ledge kink (TLK) model, which is also referred to as the terrace step kink (TSK) model, describes the thermodynamics of crystal surface formation and transformation, as well as the energetics of surface defect formation. It is based upon the idea that the energy of an atom’s position on a crystal surface is ...
Sir Martyn Poliakoff (born 16 December 1947) [3] is a British chemist known for his work on green chemistry and for being the main presenter on the popular YouTube channel Periodic Videos. [6] The core subjects of his academic work are supercritical fluids, [7] [8] infrared spectroscopy and lasers.
The series is a news series that rounds up information from the Spotlight channel. [8] YouTube also promotes the series through its Spotlight channel. Early in its history, the series used guest hosts Grace Helbig, Hannah Hart, and Mamrie Hart (no relation) to help propel the series and its audience. [9]