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Material Design (codenamed Quantum Paper) [4] is a design language developed by Google in 2014. Expanding on the "cards" that debuted in Google Now , Material Design uses more grid-based layouts, responsive animations and transitions, padding, and depth effects such as lighting and shadows.
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 ...
Placeholder name given at one time to 208 Tl, an isotope of thallium identified in the decay chain of thorium. ThX: Thorium X: 88: Name given at one time to 224 Ra, an isotope of radium identified in the decay chain of thorium. Tn: Thoron: 86: From thorium and emanation. Name given to 220 Rn, an isotope of radon identified in the decay chain of ...
A classical element referred to as the Fifth Element in ancient and medieval times. It is believed to be the material that fills the region of the universe beyond the terrestrial sphere. This belief goes as far back as Plato's Timaeus , where it is said that "there is the most translucent kind which is called by the name of aether (αἰθήρ)".
Each chemical element has a unique atomic number (Z— for "Zahl", German for "number") representing the number of protons in its nucleus. [4] Each distinct atomic number therefore corresponds to a class of atom: these classes are called the chemical elements. [5] The chemical elements are what the periodic table classifies and organizes.
A table listing the 17 rare-earth elements, their atomic number and symbol, the etymology of their names, and their main uses (see also Applications of lanthanides) is provided here. Some of the rare-earth elements are named after the scientists who discovered them, or elucidated their elemental properties, and some after the geographical ...
Theodore Gray (2009), The Elements: A Visual Exploration of Every Known Atom in the Universe, Black Dog & Leventhal Publishers, Inc. Sam Kean (2011), The Disappearing Spoon and Other True Tales of Madness, Love, and the History of the World From the Periodic Table of the Elements, Back Bay Books/Little Brown and Company
A placeholder for a time in the far past is תרפפ״ו (tarapapu), which resembles a year number in the Hebrew calendar. Years of the Hebrew calendar are commonly written in Hebrew numerals . For example, the year Anno Mundi 5726 would be written as ה׳תשכ״ו , which can be further abbreviated to תשכ״ו by omitting the first letter ...