Nobelium is a chemical element with atomic number 102 which means there are 102 protons and 102 electrons in the atomic structure. The atomic number is redundant to the chemical element, but is sometimes used to emphasize the change of numbers of nucleons in a nuclear reaction. Click here to buy a book, photographic periodic table poster, card deck, or 3D print based on the images you see here! For example, carbon has an electron configuration of [He] 2s 2 2p 2, since its atomic number is 6. Atomic mass of Nobelium is 259 u. For example, if the symbol is written as 14 6 C, the number "6" is listed. The chemical symbol for Nobelium is No.. Atomic Mass of Nobelium. Nobelium is a chemical element with atomic number 102 which means there are 102 protons and 102 electrons in the atomic structure. Element Nobelium - No Comprehensive data on the chemical element Nobelium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Nobelium. Nobelium has 12 isotopes and 3 nuclear isomers. Nobelium is the tenth transuranic element and is the penultimate member of the actinide series. Each element is uniquely defined by its atomic number. - melting point B.P. In an uncharged atom, the atomic number is also equal to the number of electrons. Atomic Number Orbital Energy Levels. The atomic number of carbon is 6. The atomic number is the smaller of the two numbers in the symbol. If necessary, a state of ionization or an excited state may be indicated in the right superscript position (e.g., state of ionization Ca 2+). - Atomic Number M.P. The chemical symbol for Nobelium is No . No. The most common way of showing the arrangement of electrons in an atom is to draw diagrams like those shown in the diagram. Common chemical compounds are also provided for many elements. Atomic mass: The mass of an atom is primarily determined by the number of protons and neutrons in its nucleus. Atomic Number of Nobelium. The atomic number of an element is equal to the total number of protons in the nucleus of the atoms of that element. For example, in a sodium atom, there are 11 electrons and 11 protons. The atomic number can provide insight into the electronic configuration of the element. More commonly, the isotope symbol already tells you the atomic number. Nobelium is an artificial chemical element, solid, metal, actinoid, radioactive, unstable, atomic number 102. Atomic number = Number of protons. The atomic number uniquely identifies a chemical element.It is identical to the charge number of the nucleus. Atomic number: The number of protons in an atom. Thus the atomic number of Na atom = number of electrons = number of protons = 11. 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