Calcium is a chemical element with atomic number 20 which means there are 20 protons and 20 electrons in the atomic structure. The chemical symbol for Bismuth is Bi. The Standard English unit is pounds mass per cubic foot (lbm/ft3). Atomic Mass Number – Does it conserve in a nuclear reaction? Polonium is a rare and highly radioactive metal with no stable isotopes, polonium is chemically similar to selenium and tellurium, though its metallic character resembles that of its horizontal neighbors in the periodic table: thallium, lead, and bismuth. Therefore the space in an atom (between electrons and an atomic nucleus) is not empty, but it is filled by a probability density function of electrons (usually known as  “electron cloud“). Ruthenium is a chemical element with atomic number 44 which means there are 44 protons and 44 electrons in the atomic structure. It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. Iodine is the least abundant of the stable halogens, being the sixty-first most abundant element. 35.5 grams is the mass of one MOLE of chlorine atoms. tsnavilan tsnavilan Answer: option d. Explanation: 1 Atom of chlorine using =35.453 amu. Discoverer: McMillan, Edwin M. and Abelson, Philip H. Discoverer: Glenn T. Seaborg, Joseph W. Kennedy, Edward M. McMillan, Arthur C. Wohl, Discoverer: Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso, Discoverer: Glenn T. Seaborg, Ralph A. James, Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Kenneth Street, Jr., Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Bernard G. Harvey, Gregory R. Choppin, Albert Ghiorso, Discoverer: Albert Ghiorso, Glenn T. Seaborg, Torbørn Sikkeland, John R. Walton, Discoverer: Albert Ghiorso, Torbjørn Sikkeland, Almon E. Larsh, Robert M. Latimer, Copyright 2020 Periodic Table | All Rights Reserved |. Dysprosium is used for its high thermal neutron absorption cross-section in making control rods in nuclear reactors, for its high magnetic susceptibility in data storage applications. The chemical symbol for Arsenic is As. Very soft and malleable, indium has a melting point higher than sodium and gallium, but lower than lithium and tin. Promethium is one of only two such elements that are followed in the periodic table by elements with stable forms. The chemical symbol for Radon is Rn. 1) You may use almost everything for non-commercial and educational use. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. Our Website follows all legal requirements to protect your privacy. Erbium is a silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. Thorium metal is silvery and tarnishes black when exposed to air, forming the dioxide. In nuclear industry cadmium is commonly used as a thermal neutron absorber due to very high neutron absorption cross-section of 113Cd. The chemical symbol for Radium is Ra. Tungsten is an intrinsically brittle and hard material, making it difficult to work. Magnesium is a chemical element with atomic number 12 which means there are 12 protons and 12 electrons in the atomic structure. 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. 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. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. A freshly exposed surface of pure copper has a reddish-orange color. al. Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. What is the mass of a single chlorine atom in grams? Mercury is a heavy, silvery d-block element, mercury is the only metallic element that is liquid at standard conditions for temperature and pressure. There are two reasons for the difference between mass number and isotopic mass, known as the mass defect: Typical densities of various substances at atmospheric pressure. Atomic Mass Number – Does it conserve in a nuclear reaction? Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure.The chemical symbol for Chlorine is Cl. The chemical symbol for Samarium is Sm. Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure. On the periodic table of the elements, atomic radius tends to increase when moving down columns, but decrease when moving across rows (left to right).