The name is derived from the english word potash. It is the electrons that are responsible for the chemical bavavior of atoms, and which identify the various chemical elements. The atomic mass is carried by the atomic nucleus, which occupies only about 10-12 of the total volume of the atom or less, but it contains all the positive charge and at least 99.95% of the total mass of the atom. See also: Atomic Number – Does it conserve in a nuclear reaction? But this “huge” space is occupied primarily by electrons, because the nucleus occupies only about 1721×10−45 m3 of space. In a neutral atom there are as many electrons as protons moving about nucleus. It is an intensive property, which is mathematically defined as mass divided by volume: The atom consist of a small but massive nucleus surrounded by a cloud of rapidly moving electrons. The ordering of the electrons in the ground state of multielectron atoms, starts with the lowest energy state (ground state) and moves progressively from there up the energy scale until each of the atom’s electrons has been assigned a unique set of quantum numbers. Since the density (ρ) of a substance is the total mass (m) of that substance divided by the total volume (V) occupied by that substance, it is obvious, the density of a substance strongly depends on its atomic mass and also on the atomic number density (N; atoms/cm3). Potassium is the major cation (positive ion) inside animal cells, while sodium is the major cation outside animal cells. The main mining area used to be Germany, which had a monopoly of potassium before the first World War. The chemical symbol K comes from kalium, the Mediaeval Latin for potash, which may have derived from the arabic word qali, meaning alkali. It must be noted, atoms lack a well-defined outer boundary. The atomic mass or relative isotopic mass refers to the mass of a single particle, and therefore is tied to a certain specific isotope of an element. As a result of this expansion, the density of most materials decreases. The atomic radius of Potassium atom is 203pm (covalent radius). The chemical symbol for Potassium is K. The atomic mass is the mass of an atom. Learn more about Quia: Create your own activities It is the Pauli exclusion principle that requires the electrons in an atom to occupy different energy levels instead of them all condensing in the ground state. The short name of the element is called symbol. Increasing the pressure on an material (especially for liquids or gases) decreases the volume of the object and thus increases its density via the atomic number density. Potassium (1+) is a monoatomic monocation obtained from potassium. Skin and eye contact can cause severe burns leading to permanent damage. Date and Place of Discovery: In 1807 in London, England: Discovered by: Sir Humphry Davy: Common Compounds: Potassium Chloride (KCl) Potassium Fluoride (PF) Potassium Iodide (KI) Interesting facts: It was the first metal to be isolated using electrolysis. It is an alkali metal cation, an elemental potassium, a monovalent inorganic cation and a monoatomic monocation. Units of measure have been defined for mass and energy on the atomic scale to make measurements more convenient to express. The size and mass of atoms are so small that the use of normal measuring units, while possible, is often inconvenient. Together with nitrogen and phosphorous, potassium is one of the essential macrominerals for plant survival. Atomic mass of Potassium is … Atomic Mass Number – Does it conserve in a nuclear reaction? Compressibility (also known as the coefficient of compressibility is a measure of the relative volume change of a fluid or solid as a response to a pressure (or mean stress) change. Feel free to ask a question, leave feedback or take a look at one of our articles. The information contained in this website is for general information purposes only. Traces of 40K are found in all potassium, and it is the most common radioisotope in the human body. On the periodic table of the elements, atomic radius tends to increase when moving down columns, but decrease when moving across rows (left to right). K is the chemical symbol of potassium.The name is derived from the english word potash. part of the name comes from the first element symbol: potassium. As such, the element is required in relatively large proportions by the growing plant. Anyone can be able to come here, learn the basics of materials science, material properties and to compare these properties. The density of Hassium results from its high atomic weight and from the significant decrease in ionic radii of the elements in the lanthanide series, known as lanthanide and actinide contraction. The chemistry of potassium is almost etirely that of the potassium ion, K+. For this purposes, a dimensionless quantity the Pauling scale, symbol χ, is the most commonly used. One unified atomic mass unit is approximately the mass of one nucleon (either a single proton or neutron) and is numerically equivalent to 1 g/mol. Potassium, as the ion K+, concnetrate inside cells, and 95% of the body's potassium is so located. It has an estimated density of 40.7 x 103 kg/m3. The classical description cannot be used to describe things on the atomic scale. Higher exposures may cause a build up of fluid in the lungs, this can cause death. Although it is soluble in water, little is lost from undisturbed soils because as it is released from dead plants and animal excrements, it quickly become strongly bound to clay particles, and it is retained ready to be readsorbed by the roots of other plants. The chemical symbol K comes from kalium, the Mediaeval Latin for potash, which may have derived from the arabic word qali, meaning alkali. A little potassium chloride goes into pharmaceuticals, medical drips and saline injections. Potassium carbonate goes into glass manufacture, expecially the glass used to make televisions, while potassium hydroxide is used to make liquid soaps and detergents. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. The number of electrons in each element’s electron shells, particularly the outermost valence shell, is the primary factor in determining its chemical bonding behavior. Other potassium salts are used in baking, photography and tanning leather, and to make iodize salts. The unit of measure for mass is the atomic mass unit (amu). For example: – Symbol ‘K’ represents the element potassium and also represents one atom of potassium. This effect is caused by a decrease in the atomic number density. 1) You may use almost everything for non-commercial and educational use. The volume of an atom is about 15 orders of magnitude larger than the volume of a nucleus.

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