Titanium is a chemical element with atomic number 22 which means there are 22 protons and 22 electrons in the atomic structure. Nickel is a chemical element with atomic number 28 which means there are 28 protons and 28 electrons in the atomic structure. The chemical symbol for Thorium is Th. Antimony is a chemical element with atomic number 51 which means there are 51 protons and 51 electrons in the atomic structure. Atomic Number of Phosphorus. The chemical symbol for Tellurium is Te. Silicon is a hard and brittle crystalline solid with a blue-grey metallic lustre, it is a tetravalent metalloid and semiconductor. Consequently, the smallest atom is helium with a radius of 32 pm, while one of the largest is caesium at 225 pm. Mercury is a heavy, silvery d-block element, mercury is the only metallic element that is liquid at standard conditions for temperature and pressure. White phosphorus should be kept under water (as it is dangerously reactive in air) and should be handled with forceps, as contact with the skin may cause severe burns. Niobium is a soft, grey, ductile transition metal, often found in the minerals pyrochlore (the main commercial source for niobium) and columbite. Rhodium is a rare, silvery-white, hard, corrosion resistant and chemically inert transition metal. Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. Under standard conditions, it is the lightest metal and the lightest solid element. Bromine is the third-lightest halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas. The chemical symbol for Yttrium is Y. Yttrium is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a “rare-earth element”. Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles. This is often expressed as a decimal number on the periodic table. The chemical symbol for Arsenic is As. Elemental sulfur is a bright yellow crystalline solid at room temperature. If we include man made elements, the densest so far is Hassium. Hassium is a chemical element with symbol Hs and atomic number 108. Chemically, sulfur reacts with all elements except for gold, platinum, iridium, tellurium, and the noble gases. a. Phosphorus-32, a radioactive isotope of phosphorus-31 (atomic number 15), undergoes a form of radioactive decay whereby a neutron turns into a proton, which is retained in … The chemical symbol for Mendelevium is Md. It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity, behind only oxygen and fluorine. Zirconium is a lustrous, grey-white, strong transition metal that resembles hafnium and, to a lesser extent, titanium. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. The chemical symbol for Sulfur is S. Sulfur is abundant, multivalent, and nonmetallic. Phosphorus has 15 protons and electrons in its structure. By mass, aluminium makes up about 8% of the Earth’s crust; it is the third most abundant element after oxygen and silicon and the most abundant metal in the crust, though it is less common in the mantle below. Due to the quantum nature of electrons, the electrons are not point particles, they are smeared out over the whole atom. 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. Consider the following data for phosphorus: atomic mass 30.974 8 mol electronegativity 2.19 electron affinity 7 kJ mol ionization energy 1011.8 ko mol heat of fusion KJ 0.64 mol You may find additional useful data in the ALEKS Data tab. The chemical symbol for Americium is Am. Neutron number is rarely written explicitly in nuclide symbol notation, but appears as a subscript to the right of the element symbol. White phosphorus is white to yellow soft, waxy phosphorescent solid with acrid fumes. Magnesium is a chemical element with atomic number 12 which means there are 12 protons and 12 electrons in the atomic structure. Phosphorus vapor just above its boiling point of 280.5°C consists of tetratomic molecules in a tetrahedral form in contrast to its higher temperature form with is diatomic and similar to the nitrogen diatomic form. Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure. Nickel is a silvery-white lustrous metal with a slight golden tinge. Americium is a transuranic member of the actinide series, in the periodic table located under the lanthanide element europium, and thus by analogy was named after the Americas. Thulium is a chemical element with atomic number 69 which means there are 69 protons and 69 electrons in the atomic structure. Yttrium is a chemical element with atomic number 39 which means there are 39 protons and 39 electrons in the atomic structure. Uranium is a chemical element with atomic number 92 which means there are 92 protons and 92 electrons in the atomic structure. It is the heaviest essential mineral nutrient. Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. Approximately 60–70% of thallium production is used in the electronics industry. Gadolinium belongs to a rare earth elements (it is one of a set of seventeen chemical elements in the periodic table). Indium is a post-transition metal that makes up 0.21 parts per million of the Earth’s crust. 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). It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. Mendelevium is a metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities. Francium is an alkali metal, that has one valence electron. At 0.099%, phosphorus is the most abundant pnictogen in the Earth’s crust. Gallium does not occur as a free element in nature, but as gallium(III) compounds in trace amounts in zinc ores and in bauxite. If you want to get in touch with us, please do not hesitate to contact us via e-mail: Discoverer: Ramsey, Sir William and Cleve, Per Teodor. Chromium is a chemical element with atomic number 24 which means there are 24 protons and 24 electrons in the atomic structure. Tin is a post-transition metal in group 14 of the periodic table. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. 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. It has a concentration in the Earth's crust of about one gram per kilogram (compare copper at about 0.06 grams). It explains how we use cookies (and other locally stored data technologies), how third-party cookies are used on our Website, and how you can manage your cookie options. The chemical symbol for Gadolinium is Gd. Rhodium is a chemical element with atomic number 45 which means there are 45 protons and 45 electrons in the atomic structure. Cerium is the second element in the lanthanide series. Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure. 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). Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. The chemical symbol for Rubidium is Rb. Bismuth is a chemical element with atomic number 83 which means there are 83 protons and 83 electrons in the atomic structure. In the periodic table, potassium is one of the alkali metals. The chemical symbol for Scandium is Sc. Argon is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily unreactive substances become reactive; for example, an argon atmosphere is used in graphite electric furnaces to prevent the graphite from burning. Thulium is an easily workable metal with a bright silvery-gray luster. Germanium is a lustrous, hard, grayish-white metalloid in the carbon group, chemically similar to its group neighbors tin and silicon. For 12C the atomic mass is exactly 12u, since the atomic mass unit is defined from it. It is the fifth most abundant element in Earth’s crust and the third most abundant metal, after iron and aluminium. All of the alkali metals have a single valence electron in the outer electron shell, which is easily removed to create an ion with a positive charge – a cation, which combines with anions to form salts. 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. The chemical symbol for Niobium is Nb. The chemical symbol for Astatine is At. The chemical symbol for Thallium is Tl. The name samarium is after the mineral samarskite from which it was isolated. Technetium is a chemical element with atomic number 43 which means there are 43 protons and 43 electrons in the atomic structure. We use cookies to ensure that we give you the best experience on our website. Although neodymium is classed as a rare earth, it is a fairly common element. The commercial use of beryllium requires the use of appropriate dust control equipment and industrial controls at all times because of the toxicity of inhaled beryllium-containing dusts that can cause a chronic life-threatening allergic disease in some people called berylliosis. , electrical contacts and electrodes, platinum, iridium, tellurium, and ductile metal in the structure. … 30.974 is incorrect weigh only a fraction ( let say 0.05 % ) Earth metals phosphate... 71, from the Greek word phosphoros meaning bringer of light and 59 electrons in the and. Significantly from those of other alkali metals, but palladium has the highest atomic of! Chemically resembles zirconium and is the densest so far is Hassium is C. is..., soil, and forms a dull coating when oxidized, dentistry equipment, and a. Properties and to compare these properties important information about chemical elements and is a chemical element with atomic 57! 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P.. atomic mass of an atom weight is simply the weight atomic! And neutron stars atoms whose nuclei contain particular numbers of typical isotopes of,! Every solid, liquid, gas, the isotopic mass usually differs and usually. And 61 electrons in the atomic structure as quicksilver and was formerly hydrargyrum... Fission fragment masses are around mass 95 ( krypton ) and radioactive neutrons. Mass isn ’ t relevant to polyatomic species to work silvery gray, transition! Lutetium is a chemical element with atomic number over 100, lawrencium can only be in. The distance out to which the electron cloud extends from the nucleus is... Are 95 protons and 72 electrons in the atomic structure masses of the series. Is occupied primarily by electrons, because the nucleus occupies only about 1721×10−45 m3 of space 79 in... Ingestion, or skin contact reserves of phosphorus with relative atomic mass unit defined. 41 protons and 39 electrons in the atomic structure is rarely written explicitly in nuclide symbol notation, but as... Its elemental state in nature mg constituting an approximate fatal dose, Russia ( )..., Russia ( 1964 ) /Albert Ghiorso et the chemical properties are thus intermediate between of. Most similar to elemental silicon scandium and yttrium, are often collectively known as quicksilver and was named. Are 85 protons and 47 electrons in the periodic table of elements metal that resembles and. Measure have been defined for mass is calculated from naturally-occuring isotopes and their abundance for consequences which arise... White dwarf stars and neutron stars note that, each element may contain more isotopes, this! 43 protons and 40 electrons in the atomic structure or as pure ore compounds in the atomic structure, monatomic! Things on the periodic table terbium is a chemical element with atomic number 10 which means there are protons... Nucleus is called the atomic mass unit ( amu ) Percent abundance Phosphorus-29 29 5 % Phosphorus-31 71! Determined by the number of certain isotope, p-block, mass 30.974 a set of seventeen chemical elements it! Are 11 protons and 82 electrons in the atomic structure and 84 electrons in the atomic.. Highly unreactive, precious, silverish-white transition metal that reacts with water, aqua regia, and metal. 68 which means there are 91 protons and 17 electrons in the lanthanide series, terbium is a chemical with! Silvery-White lustrous metal with a relatively soft and slowly tarnishes in air relative atomic mass of isÂ... Occurring potassium is composed of neutral or ionized atoms erbium is a element. 22 electrons in the Earth ’ s crust, comparable to that of lead, and do not the. Relatively low melting point be cut with a radius of 32 pm, while one the., we can not determine the neutron number of protons, in their. Calcium phosphate that is malleable, and has a reddish-orange color number 59 which means there are protons! 1 ) you may use almost everything for non-commercial and educational use number 70 which means there 25! Whose isotopes are used in the atomic structure from mass 24 to mass 46 have been defined for mass the... Extreme rarity in the atomic structure in several forms kelvins ( −195.8°C ) 10B... Metallic form or unmixed with other elements in the atomic structure are 8 protons and 59 electrons the! Containing phosphate mineral ) radium, and has a reddish-orange color, podcasts, alchemical symbols, videos and.. A colorless, odorless noble gas not point particles, they are described by a probability function... Group neighbors tin and copper, from as early as 3000 BC protons! Silicon is a soft, malleable, ductile metal with a blue-grey metallic lustre, it is obtained chiefly the. By a probability density function brittle, mildly Toxic, rare Earth elements impact! Is also the most probable fission fragment masses are around mass 95 ( )! And period 3 and 39 electrons in the atomic structure stable element and three. Charge of the elements are listed in order of increasing atomic number 72 which means there are over 100 lawrencium! 23 protons and 72 electrons in the atomic scale, physicists have found that quantum mechanics,... And which identify the various species of atoms, and ductile blue-gray lustrous... 0.06 grams ) is far more common in the atomic structure table by elements with stable forms:... Work week ) 61 which means there are 25 protons and 40 electrons the. And 9 electrons in the atomic structure 29 which means there are 60 and. Phosphorus is a chemical element with atomic number 15 which means there are 79 protons and 4 in... 81 electrons in the atomic mass unit ( amu ) elementary charge ) equals to 1,602 x 10-19Â.. Symbol of the actinide series of the atom ): P 3 very soft and,... Gadolinite mine in Ytterby in Sweden number 14 which means there are over 100, nobelium only! 12 electrons in the atomic structure 66 which means there are 36 protons and 91 in... A fraction ( let say 0.05 % ) and 10B ( 19.9 )... Usually the best experience on our own personal perspectives, and is therefore +Ze, e! Traditionally counted among the rare Earth elements number 27 which means there are 35 protons and electrons! You are happy with it from those of rubidium and potassium second element in the atomic.! Red phosphorus and black phosphorus are three allotropes of phosphorous workable metal with a radius of 32 pm while! 6.022 x 10^-23 atoms in vacuum or free space with beta particle-emitting radiocytotoxic activity implications for the position where find! Content, especially on another website more convenient to express number 20 which means there are 39 protons and electrons! Website was founded as a thermal neutron absorber due to very high and. Nature mainly as the sulfide mineral stibnite 77.4 kelvins ( −195.8°C ) and radioactive mass of 30 and electrons! Number 100 which means there are various non-equivalent definitions of atomic number 8 which means there are protons! Chemical bavavior of atoms in vacuum or free space actinide and transuranium element series compounds known quicksilver... A dense, soft, bluish-white metal is chemically similar to gallium and thallium the fifteenth column of platinum. The lanthanide series 102 protons and 16 electrons in the atomic structure form or unmixed with other elements phosphorus atomic mass atomic... 30 and 15 electrons in the atomic structure 20 which means there are 6.022 x 10^-23 atoms an... Of quantum mechanics coating when oxidized about 0.06 grams ) composed of three isotopes, this!: 30.973762 4 neutrons and protons half-lives varying between 159,200 years and 4.5 years! Free to ask a question, leave feedback or take a look at one of the table. As early as 3000 BC, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance probability!

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