Helium compounds: Helium is the smallest and the lightest noble gas and one of the most unreactive elements, so it was commonly considered that helium compounds cannot exist at all, or at least under normal conditions. Helium's first ionization energy of ... (Chemistry) [100%] 2023-11-08 [Helium compounds] [Chemical compounds by element]...
Helium compounds: Helium is the smallest and the lightest noble gas and one of the most unreactive elements, so it was commonly considered that helium compounds cannot exist at all, or at least under normal conditions. Helium's first ionization energy of ... (Class of improbable chemical compounds only formed at very high pressure or low temperature) [100%] 2024-01-21 [Helium compounds] [Chemical compounds by element]...
Holmium: Holmium (chemical symbol Ho, atomic number 67) is a relatively soft, silvery-white metallic element that is stable in dry air at room temperature. It is a member of the lanthanide series of chemical elements and is also considered one ... [90%] 2023-02-04
Holmium: Holmium is a chemical element of the periodic table whose symbol is Ho and its atomic number actually is 67. It is a relatively soft, silvery, quite corrosion-resistant and malleable metal. [90%] 2023-02-21 [Elements]
Holmium: Holmium is a chemical element with the symbol Ho and atomic number 67. It is a rare-earth element and the eleventh member of the lanthanide series. (Chemistry) [90%] 2023-10-07 [Holmium] [Chemical elements]...
Holmium: Holmium is a chemical element, having the chemical symbol Ho. Its atomic number (the number of protons) is 67. [90%] 2022-02-11
Compound: A compound is a molecule which is composed of more than one element. Table salt, for example, is sodium chloride (NaCl), a compound composed of the elements sodium (Na) and chlorine (Cl) in a 1:1 ratio. [71%] 2023-02-18 [Chemistry]
Compound: Compound, a combination of various elements, substances or ingredients, so as to form one composite whole. A “chemical compound” is a substance which can be resolved into simple constituents, as opposed to an element which cannot be so resolved (see ... [71%] 2022-09-02
Compound: Articles Most recent articles on Compound Most cited articles on Compound Review articles on Compound Articles on Compound in N Eng J Med, Lancet, BMJ Media Powerpoint slides on Compound Images of Compound Photos of Compound Podcasts & MP3s on Compound ... [71%] 2023-11-26
Compound (linguistics): This original article is about compounds in linguistics. Its aim is to provide properly sourced information about compounds, in part to support their treatment in dictionaries. (Linguistics) [71%] 2024-01-02 [Linguistics]
Compound (linguistics): In linguistics, a compound is a lexeme (less precisely, a word or sign) that consists of more than one stem. Compounding, composition or nominal composition is the process of word formation that creates compound lexemes. (Linguistics) [71%] 2024-01-02 [Syntax] [Word coinage]...
Chemical compound#Catalogs#Organic compounds: This page aims to list well-known organic compounds, including organometallic compounds. Note that purely inorganic compounds, minerals, and chemical elements are not included. [68%] 2024-08-23
Halimium: Halimium (rockrose, false sun-rose, or halimium) is a genus of 12 species of evergreen or semi-evergreen subshrubs in the family Cistaceae, closely related to Cistus. They are native to Europe, North Africa and Asia Minor, with the centre ... (Genus of flowering plants in the rock rose family Cistaceae) [64%] 2024-02-16 [Halimium] [Malvales genera]...
Horminum: Horminum is a genus of flowering plants in the family Lamiaceae, comprising a single species, Horminum pyrenaicum. Common names include dragonmouth and Pyrenean dead-nettle. (Biology) [64%] 2023-11-24 [Lamiaceae] [Monotypic Lamiaceae genera]...
Holmium acetate: Holmium acetate is the acetate salt of holmium, with a chemical formula of Ho(CH3COO)3. Holmium acetate can be obtained by dissolving holmium carbonate in acetic acid: Dissolving holmium oxide in acetic acid at a pH of 4 will ... (Chemistry) [63%] 2022-07-19 [Holmium compounds] [Acetates]...
Holmium phosphide: Holmium phosphide is a binary inorganic compound of holmium and phosphorus with the chemical formula HoP. The compound forms dark crystals and does not dissolve in water. (Chemistry) [63%] 2023-10-23 [Phosphides] [Holmium compounds]...
Holmium acetylacetonate: Holmium acetylacetonate is a coordination complex, with the chemical formula of Ho(C5H7O2)3 or Ho(acac)3. It can be obtained via the reaction between metallic holmium or holmium(III) hydride with acetylacetone, or via the reaction between Holmium ... (Chemistry) [63%] 2022-12-26 [Holmium compounds] [Acetylacetonate complexes]...
Holmium nitride: Holmium nitride is a binary inorganic compound of holmium and nitrogen with the chemical formula HoN. Reaction of finely ground metal, its hydride, or amalgam with nitrogen at 800–1000°C: The compound forms crystals of cubic system. (Chemistry) [63%] 2025-02-02 [Nitrides] [Holmium compounds]...
Helium: Helium (also known as "He" in stoichiometry circles) is the lightest of the noble gases. It holds court in stars (named after the Greek god of the sun, Helios) and kid's balloons. [60%] 2023-12-22
Helium: Helium is a chemical element, typically found as a gas in its elemental form. It has the chemical symbol He, atomic number (number of protons) Z = 2, and a standard atomic weight of 4.002602 g/mol. [60%] 2022-10-08
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