Brinell hardness:   440-600 MPa The chemical symbol for Terbium is Tb. The chemical symbol for Lawrencium is Lr. Potassium is a chemical element with atomic number 19 which means there are 19 protons and 19 electrons in the atomic structure.

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. Electron affinity:  50 kJ/mol, Half Life:  Stable (Infinity) Lanthanum is a soft, ductile, silvery-white metal that tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. Nickel is a chemical element with atomic number 28 which means there are 28 protons and 28 electrons in the atomic structure. When an electron is added to a neutral atom, energy is released. Francium is a highly radioactive metal that decays into astatine, radium, and radon. Its boiling point is the lowest among all the elements. I thought that only the valence electrons affected the oxidation states, so why does plutonium have more oxidation states (6,5,4,3) than samarium (2,3) whilst they both have the same valence electrons (including f-orbitals): ..$\ce{f^6}$..$\ce{s^2}$ ? The temperature at which the phase transition occurs is the melting point. Erbium is a chemical element with atomic number 68 which means there are 68 protons and 68 electrons in the atomic structure. As the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine. Astatine is the rarest naturally occurring element on the Earth’s crust. Rhenium is a chemical element with atomic number 75 which means there are 75 protons and 75 electrons in the atomic structure. Heat capacity is an extensive property of matter, meaning it is proportional to the size of the system. Samarium is paramagnetic (material is weakly attracted by external magnets). The chemical symbol for Titanium is Ti. Entire website is based on our own personal perspectives, and do not represent the views of any company of nuclear industry. There is an ionization energy for each successive electron removed. Caesium is a soft, silvery-gold alkali metal with a melting point of 28.5 °C, which makes it one of only five elemental metals that are liquid at or near room temperature. Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 electrons in the atomic structure. Neptunium is the first transuranic element.

Isotopes:  144Sm 145Sm 146Sm 147Sm 148Sm 149Sm 150Sm 151Sm 152Sm 153Sm 154Sm, Samarium burns readily at 150 oC to form samarium  (lll) oxide: If you continue to use this site we will assume that you are happy with it. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website.

4.5×10-11% (In Oceans), 1) China

Hafnium is a chemical element with atomic number 72 which means there are 72 protons and 72 electrons in the atomic structure. Due to it’s Magnetism remain same at high temperature, It is also used in microwave applications. 2 Sm (s) + 3 Br2 (g) → 2 SmBr3 (s) [yellow] DOT Hazard Class:  4.1 Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. Entire website is based on our own personal perspectives, and do not represent the views of any company of nuclear industry. The chemical symbol for Cadmium is Cd. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant. Number of electrons in samarium (Sm) is 62.Remember that number of electron equals to proton in a neutral atom.Eletrons are present outside of nucleus of samarium (Sm). Valence Electrons:  4f6 6s2 In chemistry and atomic physics, the electron affinity of an atom or molecule is defined as: the change in energy (in kJ/mole) of a neutral atom or molecule (in the gaseous phase) when an electron is added to the atom to form a negative ion. Uranium is weakly radioactive because all isotopes of uranium are unstable, with half-lives varying between 159,200 years and 4.5 billion years. Adding a heat will convert the solid into a liquid with no temperature change.