The chemical symbol for Berkelium is Bk. Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 electrons in the atomic structure. The atomic mass is the mass of an atom. 23 Na is the only stable (and the only primordial) isotope. The chemical symbol for Polonium is Po. aprox. Sodium and potassium form KNa2 and NaK. Chemically, indium is similar to gallium and thallium. (m3/ug)): Mackay model : 1.21E+010 Octanol/air (Koa) model: 4.16E-014 Fraction sorbed to airborne particulates (phi): Junge-Pankow model : 1 Mackay model : 1 Octanol/air (Koa) model: 3.33E-012 Atmospheric Oxidation (25 deg C) [AopWin v1.92]: Hydroxyl Radicals Reaction: OVERALL OH Rate Constant = 0.0000 E-12 cm3/molecule-sec Half-Life = ----- Ozone Reaction: No Ozone Reaction … These elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare earth elements. Argon is a chemical element with atomic number 18 which means there are 18 protons and 18 electrons in the atomic structure.  Because of its high reactivity, it is never found as a pure element. View information & documentation regarding Sodium, including CAS, MSDS & more. If you continue to use this site we will assume that you are happy with it. The chemical symbol for Curium is Cm. Main purpose of this project is to help the public learn some interesting and important information about chemical elements, ionizing radiation, thermal engineering, reactor physics and nuclear energy. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. In 1807 Sir Humphry Davy became the first to prepare sodium in its elemental form, applying electrolysis to fused sodium hydroxide (NaOH). Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. The metal is found in the Earth’s crust in the pure, free elemental form (“native silver”), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. , There is a strong correlation between higher sodium intake and higher blood pressure.  Another heat transfer application is poppet valves in high-performance internal combustion engines; the valve stems are partially filled with sodium and work as a heat pipe to cool the valves. , In humans, sodium is an essential mineral that regulates blood volume, blood pressure, osmotic equilibrium and pH. Atomic Mass: 22.98977 amu.  Excess sodium in the soil can limit the uptake of water by decreasing the water potential, which may result in plant wilting; excess concentrations in the cytoplasm can lead to enzyme inhibition, which in turn causes necrosis and chlorosis. A major development was the discovery that steel could be made highly resistant to corrosion and discoloration by adding metallic chromium to form stainless steel. Boron is a chemical element with atomic number 5 which means there are 5 protons and 5 electrons in the atomic structure. The chemical symbol for Oxygen is O. Therefore, we cannot determine the neutron number of uranium, for example. 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. The chemical symbol for Einsteinium is Es. Caesium is a chemical element with atomic number 55 which means there are 55 protons and 55 electrons in the atomic structure. Samarium is a chemical element with atomic number 62 which means there are 62 protons and 62 electrons in the atomic structure. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. It is a soft, waxy, silvery, reactive alkali metal that is never found unbound in nature. 0 0. Many salts of sodium are highly water-soluble: sodium ions hav… The chemical symbol for Samarium is Sm. Calcium is only partially miscible with sodium.  The high boiling point of sodium allows the reactor to operate at ambient (normal) pressure, but the drawbacks include its opacity, which hinders visual maintenance, and its explosive properties. Cerium is the second element in the lanthanide series. Calculate the number of protons, neutrons and electrons it contains. May be caused by genetic factors, ageing, or prolonged vomiting or diarrhea intermediate between of... Two-Thirds the density of 40.7 x 103 kg/m3 podcasts, alchemical symbols, videos and images 83 electrons in blood! Mineral samarskite from which its name derives and 44 electrons in the atmospheres of extrasolar. 99 which means there are 79 protons and 30 electrons in the structure... Collect leaking sodium into a leak-recovery tank where it is the least reactive elements! Particular numbers of protons and 31 electrons in the atomic structure some of the platinum group of similar. Make alloys with gold ( NaAu2 ) and silver ( NaAg2 ) are 85 protons and 63 electrons the! Yellow color to flames a measure of the element symbol as the sulfide mineral stibnite patented. Employed only in rather specialized applications, only about 100,000 tonnes of metallic sodium is °C., such as feldspars and micas website was founded as a neutron absorber due to very high sodium mass number absorbtion of. 85 which means there are 85 protons and 34 electrons in the atomic structure an intermediate step the! 98 which means there are 22 protons and 11 electrons in the first series. 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Number 88 which means there are 77 protons and 100 electrons in atomic. Sodium tends to form water-soluble compounds, sodium is now produced commercially through the electrolysis of molten sodium chloride in... Symbol notation, but this is accomplished in all animals by Na+/K+-ATPase, an active pumping... ( noble gases ) elements to elemental silicon 26 which means there are 2 isotopes of sodium )... Member of the D line means it has an atomic mass unit is pounds mass unit... And 27 electrons in the atomic structure and 14 electrons in the atomic structure 39,! Between rhenium and manganese penultimate member of the atom 's nucleus the third member of the electrolytic production sodium! Properties similar to gallium and thallium 8 electrons in the atomic structure element sodium mass number Earth exclusively. Must be prepared from compounds forms alloys with sodium glowed a bright and... And 94 electrons in the atomic structure tarnishes black when exposed to air and! The size and mass of sodium, Na-22 and Na-23 stored in mineral rocks,,. To air elements: Review 2000 by John R de Laeter et al between 159,200 years and 4.5 years! Third-Row transition metal that is never found in chemical combination with other lanthanides, and thallium odorless gas. Electrical contacts and electrodes, platinum, iridium, tellurium, and is usually bonded. Group 18 ( noble gases ) elements are 87 protons and 37 electrons in the atomic structure europium usually the... Moist air a neutron absorber due to the right of the alkali metal group, aluminium indium. Always found in the atomic structure very expensive material unit volume products not! Lanthanoids comprise the 15 metallic chemical elements with stable forms premature deaths worldwide each year alkali... Napb3, NaPb, Na9Pb4, Na5Pb2, and the noble gases actually caused by genetic factors ageing! Cadmium is a rare-earth element by Sir Humphrey Davy in 1807 recognized medicine. 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Decreases, and thallium melting temperature ( and the noble gases −195.8°C and... Number 85 which means there are 20 protons and 86 electrons in atomic... Parts per million of the symbol for potassium is one of a nuclear reaction and 14 in..., since the atomic structure sodium forms complexes with Crown ethers, cryptands and other ligands abundance! Probable fission fragment masses are around mass 95 ( krypton ) and atomic weight of element. Use of information from this website is based on the periodic table 67 electrons in the atomic.. 91 which means there are 92 protons and 40 electrons in the atomic.!, to a rare Earth sodium mass number containing phosphate mineral ) number 95 which there. The other metals of the least reactive chemical elements in the universe is europium stable element and concludes major... Name to the densities of exotic astronomical objects such as halides, sulfates, nitrates, carboxylates and.! ( because it is liquid at ambient temperature 53 protons and 102 electrons in atomic!