The element lanthanum has two stable isotopes, lanthanum-138 with an atomic mass of 137.9 amu and lanthanum-139 with an atomic mass of 138.9 amu. (harlequin.se)
Although Potassium only has two stable isotopes (K-39 and K-41), the long-lived radioisotope K-40 is often also regarded as a stable isotope. (shef.ac.uk)
Potassium6
comparin ion concentrations athort the cell membrane, inside tae ootside, potassium meisurs aboot 40:1, an sodium, aboot 1:10. (wikipedia.org)
Binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and other compounds of potassium where known. (shef.ac.uk)
Potassium isotopes, mainly K-40 and K-41, are used to study the impact of potassium on the growth of plants and of the human cardiovascular system. (shef.ac.uk)
[8] The exact chemical composition of potassium and sodium compounds, and the status as chemical element of potassium and sodium, was not known then, and thus Antoine Lavoisier did not include either alkali in his list of chemical elements in 1789. (handwiki.org)
In the periodic table , potassium is one of the alkali metals , all of which have a single valence electron in the outer electron shell, which is easily removed to create an ion with a positive charge (which combines with anions to form salts ). (wiki2.org)
Potassium ions are vital for the functioning of all living cells. (wiki2.org)
Abundance2
Therefore this resulting atomic mass is calculated from naturally-occurring isotopes and their abundance. (harlequin.se)
Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. (nuclear-power.com)
Radioactive isotope2
Naturally occurring lanthanum have two isotopes, one stable isotope, lanthanum-139, and one radioactive isotope that has a very long half-life, lanthanum-138. (harlequin.se)
The radioactive isotope caesium-137 has a half-life of about 30 years and is used in medical applications, industrial gauges, and hydrology. (wikizero.com)
Electron4
The primary decay mode at masses lower than the only stable isotope, 45 Sc, is electron capture , and the primary mode at masses above it is beta emission . (wikipedia.org)
They are (1) size (radius) of atoms and ions, (2) ionization energies, and (3) electron affinities. (cooljargon.com)
An atom of Yttrium in the gas phase, for example, gives off energy when it gains an electron to form an ion of Yttrium. (nuclear-power.com)
However, more energy is required to add an electron to a negative ion which overwhelms any release of energy from the electron attachment process. (nuclear-power.com)
Tellurium1
Livermorium is calculated to have some similar properties to its lighter homologues (oxygen, sulfur, selenium, tellurium, and polonium), and be a post-transition metal, though it should also show several major differences from them. (wikipedia.org)
Oxidation2
In the chemical compounds of the elements in group 3, the predominant oxidation state is +3. (wikipedia.org)
Copper forms a rich variety of compounds with oxidation states +1 and +2, which are often called cuprous and cupric , respectively. (manufacturinget.org)
Uranium compounds2
Scandium is present in most of the deposits of rare-earth and uranium compounds, but it is extracted from these ores in only a few mines worldwide. (wikipedia.org)
Helium is sourced from natural gas fields that have high concentrations of helium in the natural gas , using cryogenic gas separation techniques, and radon is usually isolated from the radioactive decay of dissolved radium , thorium , or uranium compounds. (casplantje.nl)
Neutrons1
To lose its excitation energy and reach a more stable state, a compound nucleus either fissions or ejects one or several neutrons, which carry away the energy. (wikipedia.org)
Atomic7
Though technically incorrect, the term is also often used to refer to the average atomic mass of all of the isotopes of one element. (harlequin.se)
Calculate the average atomic mass of lithium to the nearest thousandth, which occurs as two isotopes that have the following atomic masses and abundances in nature: 7.30% at 6.017 amu, and 92.70% at 7.018 amu. (harlequin.se)
by atomic or molecular ions that have the same mass-to-charge as analytes of interest. (harlequin.se)
The atomic number of selenium is 34, which places it in period 4 and group 16. (eution.best)
The primary decay products at atomic weights below 45 Sc are calcium isotopes and the primary products from higher atomic weights are titanium isotopes. (wikipedia.org)
The element with atomic number 116 is historically known as eka-polonium. (scientificlib.com)
The below table contains various combinations of targets and projectiles which could be used to form compound nuclei with atomic number 116. (scientificlib.com)
Sulfur compounds2
Many sulfur compounds are odoriferous, and the smells of odorized natural gas , skunk scent, bad breath , grapefruit , and garlic are due to organosulfur compounds. (wiki2.org)
In the latter case, the copper corrodes, as is seen when copper is exposed to air containing sulfur compounds. (manufacturinget.org)
Nuclear3
223. A total of 38 radioactive isotopes of lanthanum (excluding nuclear isomers) have been characterized, ranging in mass from 117 to 155 and in half-life from 23.5 milliseconds (lanthanum-117) to 1.02 × 10 11 years (lanthanum-138). (harlequin.se)
The longest-lived isotope of neptunium, neptunium-237, is a by-product of nuclear reactors and plutonium production. (cloudfront.net)
In nuclear industry boron is commonly used as a neutron absorber due to the high neutron cross-section of isotope 10B. (periodic-table.org)
Energies1
There are also plans to repeat the Cm-248 reaction at different projectile energies in order to probe the 2n channel, leading to the new isotope 294Uuh. (scientificlib.com)
It was first detected in 2000 and since the discovery about 30 atoms of ununhexium have been produced, either directly or as a decay product of ununoctium, and are associated with decays from the four neighbouring isotopes with masses 290-293. (scientificlib.com)
Heavier homologue2
It is a member of the 7th period and is placed in group 16 as the heaviest chalcogen, but it has not been confirmed to behave as the heavier homologue to the chalcogen polonium. (wikipedia.org)
It is placed as the heaviest member of group 16 (VIA) although a sufficiently stable isotope is not known at this time to allow chemical experiments to confirm its position as the heavier homologue to polonium. (scientificlib.com)
Sodium2
Sodium ions are the major cation in the extracellular fluid (ECF) an as sic are the major contreibutor tae the ECF osmotic pressur an ECF compartment vollum. (wikipedia.org)
A common application of the compounds of sodium is the sodium-vapour lamp, which emits light very efficiently. (handwiki.org)
Decay3
On July 19, 2000, scientists at Dubna (JLNR) detected a single decay from an atom of ununhexium following the irradiation of a Cm-248 target with Ca-48 ions. (scientificlib.com)
The measured decay data confirmed the assignment of the discovery isotope as 293Uuh. (scientificlib.com)
This isotope, and the isotope neptunium-239, are also found in trace amounts in uranium ores due to neutron capture reactions and beta decay . (cloudfront.net)
Occur1
If fusion does occur, the temporary merger-termed a compound nucleus-is an excited state. (wikipedia.org)
Isotopic1
The isotopic mass usually differs for other isotopes and is usually within 0.1 u of the mass number. (nuclear-power.com)
Discovery1
In May 2009, the Joint Working Party reported on the discovery of copernicium and acknowledged the discovery of the isotope 283Cn. (scientificlib.com)
Yttrium1
The properties of scandium compounds are intermediate between those of aluminium and yttrium . (wikipedia.org)
Amounts1
Large amounts of vanadium ions are found in a few organisms, possibly as a toxin . (twonobeliumk779.cfd)
Metal2
Based on its position in the periodic table, do you expect selenium to be a metal, a nonmetal, or a semimetal? (eution.best)
Sulfur is an essential element for all life, almost always in the form of organosulfur compounds or metal sulfides. (wiki2.org)
Found1
The name was based on the wide range of colors found in vanadium compounds. (twonobeliumk779.cfd)
Toxic2
Some germanium compounds are useful because they are toxic to bacteria but are harmless for mammals. (chemicool.com)
Nonradioactive caesium compounds are only mildly toxic , but the pure metal's tendency to react explosively with water means that caesium is considered a hazardous material, and the radioisotopes present a significant health and environmental hazard. (wikizero.com)
Half-lives1
All of the remaining radioactive isotopes have half-lives less than 4 hours, and the majority of these have half-lives less than 2 minutes. (wikipedia.org)
Find selenium in the periodic table shown in Figure \(\PageIndex{1}\) and then classify the element according to its location. (eution.best)
Electricity1
and, toward the bottom, polonium is a silver-grey solid that conducts electricity. (cooljargon.com)
Elements2
It is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. (periodic-table.org)
National collaboration on essential elements such as selenium and iodine within husbandry (cows, pigs) is extensive. (nmbu.no)
Chemical1
their outer shell of valence electrons is considered to be "full", giving them little tendency to participate in chemical reactions, and it has been possible to prepare only a few hundred noble gas compounds. (casplantje.nl)
Primary1
The data on these compounds pages are assembled and adapted from the primary literature and several other sources including the following. (webelements.com)
Important1
The most important industrial vanadium compound, vanadium pentoxide , is used as a catalyst for the production of sulfuric acid . (twonobeliumk779.cfd)
Natural1
CERAD is a partnership of various NMBU departments, DSA, NIVA, FHI and MET, based at the Isotope laboratory of NMBU's Faculty of Environmental Sciences and Natural Resource Management. (nmbu.no)