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The elements of the periodic table.
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| x name | x image | x CAS ID | x Symbol | x Atomic number | x article |
| x Helium |
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7440-59-7 | He | 2 |
Helium ( /ˈhiːliəm/ hee-lee-əm) is the chemical element with atomic number 2 and an atomic weight of 4.002602, which is represented by the symbol He. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas that heads the noble gas...
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| x Hassium |
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54037-57-9 | Hs | 108 |
Hassium (/ˈhæsiəm/ hass-ee-əm or /ˈhɑːsiəm/ hah-see-əm) is a synthetic element with the symbol Hs and atomic number 108. It is the heaviest member of the group 8 (VIII) elements. The element was first observed in 1984. Experiments have confirmed...
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| x Argon |
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7440-37-1 | Ar | 18 |
Argon ( /ˈɑrɡɒn/ ar-gon is a chemical element represented by the symbol Ar. Argon has atomic number 18 and is the third element in group 18 of the periodic table (noble gases). Argon is the third most common gas in the Earth's atmosphere, at 0.93%,...
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| x Strontium |
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7440-24-6 | Sr | 38 |
Strontium ( /ˈstrɒntiəm/ stron-tee-əm) is a chemical element with the symbol Sr and the atomic number 38. An alkaline earth metal, strontium is a soft silver-white or yellowish metallic element that is highly reactive chemically. The metal turns...
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| x Polonium |
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7440-08-6 | Po | 84 |
Polonium ( /pɵˈloʊniəm/ po-loh-nee-əm) is a chemical element with the symbol Po and atomic number 84, discovered in 1898 by Marie Skłodowska-Curie and Pierre Curie. A rare and highly radioactive element, polonium is chemically similar to bismuth and...
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| x Selenium |
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7782-49-2 | Se | 34 |
Selenium (/sɨˈliːniəm/ sə-lee-nee-əm) is a chemical element with atomic number 34, chemical symbol Se, and an atomic mass of 78.96. It is a nonmetal, whose properties are intermediate between those of adjacent chalcogen elements sulfur and tellurium...
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| x Xenon |
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7440-63-3 | Xe | 54 |
Xenon is a chemical element with the symbol Xe and atomic number 54. The element name is pronounced /ˈzɛnɒn/ zen-on or /ˈziːnɒn/ zee-non. A colorless, heavy, odorless noble gas, xenon occurs in the Earth's atmosphere in trace amounts. Although...
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| x Silicon |
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7440-21-3 | Si | 14 |
Silicon ( /ˈsɪlɨkən/ sil-ə-kən or /ˈsɪlɨkɒn/ sil-ə-kon) is a chemical element with the symbol Si and atomic number 14. A tetravalent metalloid, it is less reactive than its chemical analog carbon, the nonmetal directly above it in the periodic table...
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| x Ununpentium |
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54085-64-2 | Uup | 115 |
Ununpentium is the temporary name of a synthetic superheavy element in the periodic table that has the temporary symbol Uup and has the atomic number 115.
It is placed as the heaviest member of group 15 (VA) although a sufficiently stable isotope is...
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| x Protactinium |
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7440-13-3 | Pa | 91 |
Protactinium ( /ˌproʊtækˈtɪniəm/ proh-tak-tin-ee-əm) is a chemical element with the symbol Pa and atomic number 91. It is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. It forms various chemical...
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| x Dysprosium |
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7429-91-6 | Dy | 66 |
Dysprosium ( /dɪsˈproʊziəm/ dis-proh-zee-əm) is a chemical element with the symbol Dy and atomic number 66. It is a rare earth element with a metallic silver luster. Dysprosium is never found in nature as a free element, though it is found in...
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| x Plutonium |
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7440-07-5 | Pu | 94 |
Plutonium ( /pluːˈtoʊniəm/ ploo-toh-nee-əm) is a transuranic radioactive chemical element with the chemical symbol Pu and atomic number 94. It is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, forming a dull coating...
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| x Nitrogen |
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7727-37-9 | N | 7 |
Nitrogen ( /ˈnaɪtrɵdʒən/ ny-trə-jən) is a chemical element that has the symbol N, atomic number of 7 and atomic mass 14.00674 u. Elemental nitrogen is a colorless, odorless, tasteless, and mostly inert diatomic gas at standard conditions,...
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| x Iodine |
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7553-56-2 | I | 53 |
Iodine is a chemical element with the symbol I and atomic number 53. The name is pronounced /ˈaɪ.ɵdaɪn/ eye-o-dyne, /ˈaɪ.ɵdɨn/ eye-o-dən, or /ˈaɪ.ɵdiːn/ eye-o-deen in both American and British English. The name is from the Greek: ιώδης iodes,...
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| x Carbon |
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7440-44-0 | C | 6 |
Carbon /ˈkɑrbən/ (from Latin: carbo "coal") is the chemical element with symbol C and atomic number 6. As a member of group 14 on the periodic table, it is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds....
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| x Thallium |
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7440-28-0 | Tl | 81 |
Thallium ( /ˈθæliəm/ thal-ee-əm) is a chemical element with the symbol Tl and atomic number 81. This soft gray poor metal resembles tin but discolors when exposed to air. The two chemists William Crookes and Claude-Auguste Lamy discovered thallium...
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| x Beryllium |
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7440-41-7 | Be | 4 |
Beryllium ( /bəˈrɪliəm/ bə-ril-ee-əm) is the chemical element with the symbol Be and atomic number 4. It is a divalent element which occurs naturally only in combination with other elements in minerals. Notable gemstones which contain beryllium...
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| x Meitnerium |
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54038-01-6 | Mt | 109 |
Meitnerium ( /maɪtˈnɪəriəm/ myt-neer-ee-əm or /maɪtˈnɜriəm/ myt-nur-ee-əm) is a chemical element with the symbol Mt and atomic number 109. It is placed as the heaviest member of group 9 (or VIII) in the periodic table but a sufficiently stable...
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| x Chromium |
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7440-47-3 | Cr | 24 |
Chromium ( /ˈkroʊmiəm/ kroh-mee-əm) is a chemical element which has the symbol Cr and atomic number 24. It is the first element in Group 6. It is a steely-gray, lustrous, hard metal that takes a high polish and has a high melting point. It is also...
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| x Mercury |
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7439-97-6 | Hg | 80 |
Mercury is a chemical element with the symbol Hg and atomic number 80. It is also known as quicksilver or hydrargyrum (from "hydr-" water and "argyros" silver). A heavy, silvery d-block element, mercury is the only metal that is liquid at standard...
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| x Yttrium |
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7440-65-5 | Y | 39 |
Yttrium ( /ˈɪtriəm/ it-ree-əm) is a chemical element with symbol Y and atomic number 39. It is a silvery-metallic transition metal chemically similar to the lanthanides and it has often been classified as a "rare earth element". Yttrium is almost...
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| x Scandium |
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7440-20-2 | Sc | 21 |
Scandium ( /ˈskændiəm/ skan-dee-əm) is a chemical element with symbol Sc and atomic number 21. A silvery-white metallic transition metal, it has historically been sometimes classified as a rare earth element, together with yttrium and the...
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| x Tellurium |
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13494-80-9 | Te | 52 |
Tellurium ( /tɨˈlʊəriəm/ tə-loor-ee-əm or /tɛˈlʲʊəriəm/ te-loor-ee-əm) is a chemical element that has the symbol Te and atomic number 52. A brittle, mildly toxic, rare, silver-white metalloid which looks similar to tin, tellurium is chemically...
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| x Astatine |
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7440-68-8 | At | 85 |
Astatine (/ˈæstətiːn/ as-tə-teen or /ˈæstətɪn/ as-tə-tin) is a radioactive chemical element with the symbol At and atomic number 85. It occurs on the Earth only as the result of decay of heavier elements, and decays away rapidly, so much less is...
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| x Lead |
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7439-92-1 | Pb | 82 |
Lead ( /ˈlɛd/) is a main-group element in the carbon group with the symbol Pb (from Latin: plumbum) and atomic number 82. Lead is a soft, malleable poor metal. It is also counted as one of the heavy metals. Metallic lead has a bluish-white color...
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| x Iron |
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7439-89-6 | Fe | 26 |
Iron (/ˈaɪərn/ eye-ər-n) is a chemical element with the symbol Fe (from Latin: ferrum) and atomic number 26. It is a metal in the first transition series. It is the most common element (by mass) forming the planet Earth as a whole, forming much of...
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| x Berkelium |
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7440-40-6 | Bk | 97 |
Berkelium ( /bərˈkiːliəm/ bər-kee-lee-əm, less commonly /ˈbɜrkliəm/ burk-lee-əm), is a transuranic radioactive chemical element with the symbol Bk and atomic number 97, a member of the actinide and transuranium element series. It is named after the...
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| x Platinum |
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7440-06-4 | Pt | 78 |
Platinum ( /ˈplætɨnəm/ or /ˈplætənəm/) is a chemical element with the chemical symbol Pt and an atomic number of 78. Its name is derived from the Spanish term platina del Pinto, which is literally translated into "little silver of the Pinto River."...
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| x Dubnium |
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53850-35-4 | Db | 105 |
Dubnium ( /ˈduːbniəm/ doob-nee-əm), is a chemical element with the symbol Db and atomic number 105, named after the town of Dubna in Russia, where it was first produced. It is a synthetic element (an element that can be created in a laboratory but...
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| x Seaborgium |
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54038-81-2 | Sg | 106 |
Seaborgium (/siːˈbɔrɡiəm/ see-bor-gee-əm) is a synthetic chemical element with the symbol Sg and atomic number 106.
Seaborgium is a synthetic element whose most stable isotope Sg has a half-life of 1.9 minutes. A new isotope Sg has a potentially...
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| x Rutherfordium |
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53850-36-5 | Rf | 104 |
Rutherfordium ( /ˌrʌðərˈfɔrdiəm/ rudh-ər-for-dee-əm) is a chemical element with symbol Rf and atomic number 104, named in honor of New Zealand physicist Ernest Rutherford. It is a synthetic element (an element that can be created in a laboratory but...
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| x Tin |
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7440-31-5 | Sn | 50 |
Tin ( /ˈtɪn/ tin) is a chemical element with the symbol Sn (for Latin: stannum) and atomic number 50. It is a main group metal in group 14 of the periodic table. Tin shows chemical similarity to both neighboring group 14 elements, germanium and lead...
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| x Cerium |
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7440-45-1 | Ce | 58 |
Cerium /ˈsɪəriəm/ is a chemical element with the symbol Ce and atomic number 58. It is a soft, silvery, ductile metal which easily oxidizes in air. Cerium was named after the dwarf planet Ceres (itself named for the Roman goddess of agriculture)....
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| x Oxygen |
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7782-44-7 | O | 8 |
Oxygen ( /ˈɒksɨdʒɨn/ ok-si-jin) is the element with atomic number 8 and represented by the symbol O. Its name derives from the Greek roots ὀξύς (oxys) ("acid", literally "sharp", referring to the sour taste of acids) and -γενής (-genēs) ("producer",...
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| x Fluorine |
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7782-41-4 | F | 9 |
Fluorine is the chemical element with atomic number 9, represented by the symbol F. It is the lightest element of the halogen column of the periodic table and has a single stable isotope, fluorine-19. At standard pressure and temperature, fluorine...
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| x Gallium |
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7440-55-3 | Ga | 31 |
Gallium ( /ˈɡæliəm/ gal-ee-əm) is a chemical element that has the symbol Ga and atomic number 31. Elemental gallium does not occur in nature, but as the gallium(III) salt in trace amounts in bauxite and zinc ores. A soft silvery metallic poor metal,...
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| x Ytterbium |
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7440-64-4 | Yb | 70 |
Ytterbium ( /ɨˈtɜrbiəm/ i-tur-bee-əm) is a chemical element with the symbol Yb and atomic number 70. A soft silvery metallic element, ytterbium is a rare earth element of the lanthanide series and is found in the minerals gadolinite, monazite, and...
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| x Neon |
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7440-01-9 | Ne | 10 |
Neon ( /ˈniːɒn/ nee-on) is the chemical element that has the symbol Ne and an atomic number of 10. Although a very common element in the universe, it is rare on Earth. A colorless, inert noble gas under standard conditions, neon gives a distinct...
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| x Tungsten |
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7440-33-7 | W | 74 |
Tungsten /ˈtʌŋstən/, also known as wolfram /ˈwʊlfrəm/ (wuul-frəm), is a chemical element with the chemical symbol W and atomic number 74. The word Tungsten comes from the Swedish language tung sten directly translatable to heavy stone.
A hard, rare...
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| x Rhenium |
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7440-15-5 | Re | 75 |
Rhenium (pronunciation: /ˈriːniəm/ ree-nee-əm) is a chemical element with the symbol Re and atomic number 75. It is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. With an average concentration of 1 part per...
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| x Zinc |
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7440-66-6 | Zn | 30 |
Zinc (/ˈzɪŋk/ zingk; from German: Zink), or spelter (which may also refer to zinc alloys), is a metallic chemical element; it has the symbol Zn and atomic number 30. It is the first element in group 12 of the periodic table. Zinc is, in some...
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| x Uranium |
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7440-61-1 | U | 92 |
Uranium ( /jʊˈreɪniəm/ yew-ray-nee-əm) is a silvery-white metallic chemical element in the actinide series of the periodic table, with atomic number 92. It is assigned the chemical symbol U. A uranium atom has 92 protons and 92 electrons, of which 6...
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| x Ununhexium |
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54100-71-9 | Uuh | 116 |
Ununhexium is the temporary name of a synthetic superheavy element with the temporary symbol Uuh and atomic number 116. As of December 1, 2011 (2011 -12-01), the name livermorium is in the IUPAC name approval process.
It is placed as the heaviest...
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| x Roentgenium |
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54386-24-2 | Rg | 111 |
Roentgenium is a synthetic radioactive chemical element with the symbol Rg and atomic number 111. It is placed as the heaviest member of the group 11 (IB) elements, although a sufficiently stable isotope has not yet been produced in a sufficient...
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| x Curium |
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7440-51-9 | Cm | 96 |
Curium ( /ˈkjʊəriəm/ kewr-ee-əm) is a transuranic radioactive chemical element with the symbol Cm and atomic number 96. This radioactive transuranic element of the actinide series was named after Marie Skłodowska-Curie and her husband Pierre Curie....
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| x Antimony |
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7440-36-0 | Sb | 51 |
Antimony ( /ænˈtɪmɵni/ an-ti-mo-nee or /ˈæntəˌmoʊni/ an-tə-moh-nee; Latin: stibium) is a toxic chemical element with the symbol Sb and an atomic number of 51. A lustrous grey metalloid, it is found in nature mainly as the sulfide mineral stibnite ...
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| x Ruthenium |
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7440-18-8 | Ru | 44 |
Ruthenium ( /ruːˈθiːniəm/ roo-thee-nee-əm) is a chemical element with symbol Ru and atomic number 44. It is a rare transition metal belonging to the platinum group of the periodic table. Like the other metals of the platinum group, ruthenium is...
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| x Vanadium |
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7440-62-2 | V | 23 |
Vanadium ( /vəˈneɪdiəm/ və-nay-dee-əm) is a chemical element with the symbol V and atomic number 23. It is a hard, silvery gray, ductile and malleable transition metal. The formation of an oxide layer stabilizes the metal against oxidation. The...
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| x Niobium |
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7440-03-1 | Nb | 41 |
Niobium ( /naɪˈoʊbiəm/) ny-oh-bee-əm or columbium (/kəˈlʌmbiəm/ kə-lum-bee-əm), is a chemical element with the symbol Nb and atomic number 41. It is a soft, grey, ductile transition metal, which is often found in the pyrochlore mineral, the main...
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| x Praseodymium |
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7440-10-0 | Pr | 59 |
Praseodymium ( /ˌpreɪziːɵˈdɪmiəm/ pray-zee-o-dim-ee-əm) is a chemical element that has the symbol Pr and atomic number 59. Praseodymium is a soft, silvery, malleable and ductile metal in the lanthanide group. It is too reactive to be found in native...
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| x Americium |
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7440-35-9 | Am | 95 |
Americium ( /ˌæməˈrɪsiəm/ am-ə-ris-ee-əm) is a transuranic radioactive chemical element that has the symbol Am and atomic number 95. This transuranic element of the actinide series is located in the periodic table below the lanthanide element...
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| x Osmium |
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7440-04-2 | Os | 76 |
Osmium ( /ˈɒzmiəm/ oz-mee-əm) is a chemical element with the symbol Os and atomic number 76. It is a hard, brittle, blue-gray or blue-black transition metal in the platinum family and is the densest natural element, with a density of 22.59 g/cm ...
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| x Neptunium |
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7439-99-8 | Np | 93 |
Neptunium ( /nɛpˈtjuːniəm/ nep-tew-nee-əm) is a chemical element with the symbol Np and atomic number 93. A radioactive metal, neptunium is the first transuranic element and belongs to the actinide series. Its most stable isotope, Np, is a by...
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| x Magnesium |
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7439-95-4 | Mg | 12 |
An alkaline earth metal, Magnesium is important for many biochemical functions and reactions; for bone and muscle function, protein and fatty acid formation, activation of B vitamins, blood clotting, insulin secretion, and ATP formation. More than...
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| x Silver |
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7440-22-4 | Ag | 47 |
Silver ( /ˈsɪlvər/ sil-vər) is a metallic chemical element with the chemical symbol Ag (Latin: argentum, from the Indo-European root *arg- for "grey" or "shining") and atomic number 47. A soft, white, lustrous transition metal, it has the highest...
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| x Phosphorus |
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7723-14-0 | P | 15 |
Phosphorus ( /ˈfɒsfərəs/ fos-fər-əs) is the chemical element that has the symbol P and atomic number 15. A multivalent nonmetal of the nitrogen group, phosphorus as a mineral is almost always present in its maximally oxidized state, as inorganic...
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| x Nobelium |
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10028-14-5 | No | 102 |
Nobelium ( /noʊˈbɛliəm/ noh-bel-ee-əm or /noʊˈbiːliəm/ noh-bee-lee-əm) is a synthetic element with the symbol No and atomic number 102. It was first correctly identified in 1966 by scientists at the Flerov Laboratory of Nuclear Reactions in Dubna,...
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| x Hafnium |
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7440-58-6 | Hf | 72 |
Hafnium ( /ˈhæfniəm/ haf-nee-əm) is a chemical element with the symbol Hf and atomic number 72. A lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in zirconium minerals. Its existence was...
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| x Calcium |
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7440-70-2 | Ca | 20 |
Calcium ( /ˈkælsiəm/ kal-see-əm) is the chemical element with the symbol Ca and atomic number 20. It has an atomic mass of 40.078 amu. Calcium is a soft gray alkaline earth metal, and is the fifth-most-abundant element by mass in the Earth's crust....
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| x Fermium |
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7440-72-4 | Fm | 100 |
Fermium ( /ˈfɜrmiəm/ fur-mee-əm) is a synthetic element with the symbol Fm. It is the 100th element in the periodic table and a member of the actinide series. It is the heaviest element that can be formed by neutron bombardment of lighter elements,...
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