Protons/electrons: 1Neutrons: 0Shell structure: 1Electron configuration: 1s1Oxidation state: 1,-1Crystal structure: hexagonal Hydrogen is the most abundant element in the universe, making up 75% of matter by mass and over 90% by number of atoms. This element is found in great quantities...
Name, symbol, number Hydrogen, H, 1 Category Nonmetal Atomic weight 1.008 Electrons, protons, neutrons 1, 1, 0 Color, odor Colorless, odorless Toxicity None, simple asphyxiant Phase Gas Density Gas: 0.089 g l−1, liquid: 0.07 g cm3 Ionization energy 13.5989 eV Liquid to gas expansion rat...
Hydrogen bonds are a type of dipole-dipole interaction formed between any X group-attached proton, where X is an electronegative atom, and an electronegative atom (Y) containing a pair of nonbonded electrons. The important hydrogen bonds occur in molecules where X and Y are N, O, or F ato...
Protons/electrons: 1Neutrons: 0Shell structure: 1Electron configuration: 1s1Oxidation state: 1,-1Crystal structure: hexagonal Hydrogen is the most abundant element in the universe, making up 75% of matter by mass and over 90% by number of atoms. This element is found in great quant...
Editors select a small number of articles recently published in the journal that they believe will be particularly interesting to readers, or important in the respective research area. The aim is to provide a snapshot of some of the most exciting work published in the various research areas of...
Protons and neutrons both have a mass of ~1 atomic mass unit. Electrons are too small to consider their masses in an atom's mass number. To find an atom's mass number, simply add up all the protons and neutrons within the atom's nucleus. ...
The most common isotope of hydrogen is protium (name rarely used, symbol H) with a single proton and no neutrons. In ionic compounds it can take a negative charge (an anion known as a hydride and written as H−), or as a positively-charged species H+. The latter cation is written ...
What charge would an ion that has 11 protons, 11 neutrons, and 10 electrons would have? What is the charge of an oxygen ion? What type of charge do electrons carry? What is a hydrogen bond acceptor? Where do hydrogen ions come from?
The most studied ternary metal–oxide proton conductors have the perovskite (ABO3) structure, consisting of corner-sharing BO6octahedra, such as BaZrO3and BaCeO3.15,16Protons are typically incorporated through hydration. Here, absorbed water dissociates into OH−groups and protons, with the former...
The emergence of neutral hydrogen atoms throughout the universe occurred about 370,000 years later during the recombination epoch, when the plasma had cooled enough for electrons to remain bound to protons.[10] Hydrogen is nonmetallic (except when it becomes metallic at extremely high pressures) ...