The chemical symbol for Protactinium is Pa. Protactinium is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. The bulk properties of astatine are not known with any certainty. The chemical symbol for Lutetium is Lu. It is even less abundant than the so-called rare earths. 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. It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. Chemically, indium is similar to gallium and thallium. The chemical symbol for Polonium is Po. Nobelium is the tenth transuranic element and is the penultimate member of the actinide series. Molybdenum is a chemical element with atomic number 42 which means there are 42 protons and 42 electrons in the atomic structure. The chemical symbol for Chlorine is Cl. 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. Titanium is a lustrous transition metal with a silver color, low density, and high strength. Electron configuration is complicated. 7 protons 7 neutrons 7 electrons. Germanium is a chemical element with atomic number 32 which means there are 32 protons and 32 electrons in the atomic structure. The chemical symbol for Uranium is U. answer choices . Therefore the mass is 16. Naturally occurring potassium is composed of three isotopes, of which 40K is radioactive. The chemical symbol for Arsenic is As. The 18 after the oxygen indicates its atomic weight. Because of its closed-shell electron configuration, its density and melting and boiling points differ significantly from those of most other lanthanides. All oxygen atoms have 8 protons. Tags: Question 9 . The oxide anion has a charge of 2-. Nuclides that have the same neutron number but a different proton number are called isotones. Lutetium is a silvery white metal, which resists corrosion in dry air, but not in moist air. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. For example, one of the better-known oxygen isotopes is called oxygen-18 (O-18). Neutron Number and Mass Number of Oxygen. You didn't give a mass number. The chemical symbol for Neon is Ne. Name: Oxygen. What is nitrogen's atomic weight? 30 seconds . Mercury is a heavy, silvery d-block element, mercury is the only metallic element that is liquid at standard conditions for temperature and pressure. In some respects zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size. The chemical symbol for Hafnium is Hf. Lead is a chemical element with atomic number 82 which means there are 82 protons and 82 electrons in the atomic structure. Oxygen has an atomic number of 8. The chemical symbol for Copper is Cu. The chemical symbol for Silicon is Si. Thorium is a naturally-occurring element and it is estimated to be about three times more abundant than uranium. Tin is a post-transition metal in group 14 of the periodic table. The chemical properties of this silvery gray, crystalline transition metal are intermediate between rhenium and manganese. 9 C. 10 D. 18 Our Website follows all legal requirements to protect your privacy. SURVEY . If an atom has 3 electrons, how many protons does it have? Sodium is a chemical element with atomic number 11 which means there are 11 protons and 11 electrons in the atomic structure. Each atom has many possible isotopes that vary from each other in the number of neutrons, so I'll list the most common one. Zirconium is mainly used as a refractory and opacifier, although small amounts are used as an alloying agent for its strong resistance to corrosion. In nuclear reactors, promethium equilibrium exists in power operation. Additionally, if the atom becomes an ion, it either loses electrons or gains them. Xenon is a colorless, dense, odorless noble gas found in the Earth’s atmosphere in trace amounts. Lead is soft and malleable, and has a relatively low melting point. The difference is a measure of the nuclear binding energy which holds the nucleus together. Barium is a chemical element with atomic number 56 which means there are 56 protons and 56 electrons in the atomic structure. In nuclear industry, especially natural and artificial samarium 149 has an important impact on the operation of a nuclear reactor. 3. Technetium is a chemical element with atomic number 43 which means there are 43 protons and 43 electrons in the atomic structure. Gallium is a chemical element with atomic number 31 which means there are 31 protons and 31 electrons in the atomic structure. Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. 4. It is the eponym of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table, of which lanthanum is the first and the prototype. Silicon is a hard and brittle crystalline solid with a blue-grey metallic lustre, it is a tetravalent metalloid and semiconductor. The chemical symbol for Terbium is Tb. The atomic number for oxygen is 8, so the atom has 8 electrons and 8 protons. We assume no responsibility for consequences which may arise from the use of information from this website. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. This website was founded as a non-profit project, build entirely by a group of nuclear engineers. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3. Thorium is commonly found in monazite sands (rare earth metals containing phosphate mineral). Titanium can be used in surface condensers. Molybdenum a silvery metal with a gray cast, has the sixth-highest melting point of any element. 14. A neutral oxygen atom as also has 8 electrons. All oxide anions, "O"^(2-)", have 8 protons and 10 electrons. The chemical symbol for Dysprosium is Dy. 9 C. 10 D. 18 The chemical symbol for Thorium is Th. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. Iridium is a very hard, brittle, silvery-white transition metal of the platinum group, iridium is generally credited with being the second densest element (after osmium). The chemical symbol for Platinum is Pt. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs). The chemical symbol for Radium is Ra. protons: 8 neutrons: ? Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. Fermium is a member of the actinide series. www.nuclear-power.net. A scientist is studying isotopes of oxygen: oxygen-17 and oxygen-18. Sodium is a soft, silvery-white, highly reactive metal. The chemical symbol for Neptunium is Np. 8: If an atom has 12 electrons, what is its atomic number? Beryllium is a chemical element with atomic number 4 which means there are 4 protons and 4 electrons in the atomic structure. Electrons are not always added to the outermost To do this, you need to write in the search box (for example, google) how many neutrons are in oxygen and add to it an additional word: converter or calculator . The most probable fission fragment masses are around mass 95 (Krypton) and 137 (Barium). © 2019 periodic-table.org / see also Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure. Edit: For all intents and purposes, a proton is considered to have a mass of 1 amu. The chemical symbol for Gold is Au. How many neutrons does oxygen-18 have? The chemical symbol for Krypton is Kr. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. Discoverer: Davy, Sir H. and Thénard, L.-J. These have similar chemical properties, but palladium has the lowest melting point and is the least dense of them. Oxygen has the atomic number 8, which means the nuclei of its atoms have 8 protons. 14. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant. Xenon is a chemical element with atomic number 54 which means there are 54 protons and 54 electrons in the atomic structure. Pure germanium is a semiconductor with an appearance similar to elemental silicon. 5. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. Isotopes are variants of the same chemical element that have different numbers of neutrons. ----protons -----neutrons --- … Iodine is a chemical element with atomic number 53 which means there are 53 protons and 53 electrons in the atomic structure. For example, the neutron number of uranium-238 is 238-92=146. It rarely occurs in its elemental state or as pure ore compounds in the Earth’s crust. Lead is widely used as a gamma shield. Its properties are thus intermediate between those of chlorine and iodine. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. The chemical symbol for Osmium is Os. Carbon is the 15th most abundant element in the Earth’s crust, and the fourth most abundant element in the universe by mass after hydrogen, helium, and oxygen. The chemical symbol for Hydrogen is H. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. Mass numbers of typical isotopes of Oxygen are 16; 17; 18. Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. These extra neutrons are necessary for stability of the heavier nuclei. Tags: Question 8 . Oxygen - 18 (aka 18O 8 protons + 10 neutrons; a “heavy” oxygen). Hafnium’s large neutron capture cross-section makes it a good material for neutron absorption in control rods in nuclear power plants, but at the same time requires that it be removed from the neutron-transparent corrosion-resistant zirconium alloys used in nuclear reactors. All oxide anions, "O"^(2-)", have 8 protons and 10 electrons. The chemical symbol for Antimony is Sb. 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. Osmium is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. is a function of climate/environment 16O ~99.8% 18O ~0.2% To determine the stability of an isotope you can use the ratio neutron/proton (N/Z). An element's atomic... Our experts can answer your tough homework and study questions. Uranium has the highest atomic weight of the primordially occurring elements. Many other rare types of decay, such as spontaneous fission or neutron emission are known. answer choices . Berkelium is a chemical element with atomic number 97 which means there are 97 protons and 97 electrons in the atomic structure. Since oxygen is in group 6 it means that it has 6 valence electrons. Tantalum is a chemical element with atomic number 73 which means there are 73 protons and 73 electrons in the atomic structure. It readily forms hard, stable carbides in alloys, and for this reason most of world production of the element (about 80%) is used in steel alloys, including high-strength alloys and superalloys. Scandium is a chemical element with atomic number 21 which means there are 21 protons and 21 electrons in the atomic structure. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. The chemical symbol for Praseodymium is Pr. The atomic mass is the mass of an atom. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. It is the fourth most common element in the Earth’s crust. Answer: 1 question How many neutrons does hydrogen have? The chemical symbol for Barium is Ba. Number of neutrons=16-8=8. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. Tellurium is far more common in the universe as a whole than on Earth. Praseodymium is the third member of the lanthanide series and is traditionally considered to be one of the rare-earth metals. Basic Information. Choose the calculator you like. The chemical symbol for Chromium is Cr. How many neutrons are in a … answer choices . Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. Its extreme rarity in the Earth’s crust, comparable to that of platinum. Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. Oxygen has 8 neutrons. 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. The number of valence electrons is equal with the group number. Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure. Gold is a chemical element with atomic number 79 which means there are 79 protons and 79 electrons in the atomic structure. The chemical symbol for Plutonium is Pu. This means that it has gained two electrons from another element, such as sodium or magnesium. Nearly all technetium is produced synthetically, and only minute amounts are found in the Earth’s crust. Platinum is used in catalytic converters, laboratory equipment, electrical contacts and electrodes, platinum resistance thermometers, dentistry equipment, and jewelry. Iridium is a chemical element with atomic number 77 which means there are 77 protons and 77 electrons in the atomic structure. The chemical symbol for Tellurium is Te. What is nitrogen's atomic weight? Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. Monatomic form ( H ) is the second element in group 7 of the periodic table, potassium a. 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