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Potassium-40 (40 K) is a radioactive isotope of potassium which has a long half-life of 1.25 billion years. It makes up about 0.012% (120 ppm ) of the total amount of potassium found in nature. Potassium-40 undergoes three types of radioactive decay .
GoldenEye: Source - A total conversion for Half-Life 2 that aims to recreate the original Nintendo 64 classic GoldenEye 007. It received Mod DB's "Editors' Choice for Reinvention" in 2006, [53] "Third Place, Mod of the Year" in 2006, [34] and "Fourth Place, Top Unreleased Mods" in 2005. [54] Half-Life 2: Capture the Flag - A simple capture-the ...
Radioactive isotope table "lists ALL radioactive nuclei with a half-life greater than 1000 years", incorporated in the list above. The NUBASE2020 evaluation of nuclear physics properties F.G. Kondev et al. 2021 Chinese Phys. C 45 030001.
Half-Life 2: 2012 September 14 2020 March 6 The game is a remake of Valve's game Half-Life. Chex Quest: Doom: 1996 A total conversion of The Ultimate Doom, Chex Quest was a Chex cereal promotion aimed at children aged 6–9 and up. [10] [11] It was the first video game ever to be included in cereal boxes as a prize. [12] Chivalry: Medieval ...
All other potassium isotopes have half-lives under a day, most under a minute. The least stable is 31 K, a three-proton emitter discovered in 2019; its half-life was measured to be shorter than 10 picoseconds. [5] [6] Stable potassium isotopes have been used for several nutrient cycling studies since potassium is a macronutrient required for ...
Since the release of the Source engine SDK, a large number of modifications (mods) have been developed by the Half-Life 2 community. Mods vary in scale, from fan-created levels like Minerva and weapons, to partial conversions such as Rock 24, Half-Life 2 Substance and SMOD (which modify the storyline and gameplay of the pre-existing game ...
Deathmatch Classic – A free, official Half-Life mod by Valve that updates the multiplayer gameplay from id Software's Quake, featuring enhanced textures, models, and lighting. [4] It was released on June 7, 2001, [5] and included in an update to Half-Life a month later. [6] OS X and Linux ports of the Windows game were released through Steam ...
While 40 K comprises only 0.001167% of total potassium mass, 40 Ca makes up 96.9821% of total calcium mass; thus, 40 K decay leads to significantly greater 40 Ca enrichment than any other isotope. [8] The decay constant for the decay to 40 Ca is denoted as λ β and equals 4.962 × 10 −10 yr −1; the decay constant to 40