more than one answer is possible 1. Seaborgium: Value is a guess based on periodic table trend. They belong to a mathematical progression in atomic number such that Z + 8 describes the next atomic number 2. they all have an unpaired electron in an s orbital 3. Remember, the f orbital has to included before the d orbital because bismuth is after the lanthanide series. An atom's electron configuration is a numeric representation of its electron orbitals. Notes on the Electron Configuration of particular elements: Dubnium: Value is a guess based on periodic table trend. Correct Electron Configuration for Copper (Cu) Both of the configurations have the correct numbers of electrons in each orbital, it is just a matter of how the electronic configuration notation is written (here is an explanation why). Bohrium: Value is a guess based on periodic table trend. As an approximate rule, electron configurations are given by the Aufbau principle and the Madelung rule . ... Electron Configuration: 1s 2 2s 2 p 6 3s 2 p 6 d 10 4s 2 p 6 d 10 5s 2 p 6 6s 1; 4. Another way to look at how the electrons are arranged in bismuth is in orbitals. The electron configuration of a neutral calcium atom is "1s"^2"2s"^2"2p"^6"3s"^2"3p"^6"4s"^2". A calcium 2+ ion has lost its two valence electrons, … They all have an unpaired electron with a magnetic quantum number, ml=0. The +2, or cupric, ion is more stable than the +1 cuprous ion. Therefore we have (still incorrect) 1s 2 2s 2 2p 6 3s 2 3p 6 3d 9 4s 2. Hassium: Value is a guess based on periodic table trend. This means that in a neutral calcium atom, there are 20 protons in its nucleus. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 A neutral calcium atom also has 20 electrons. So, if we were to add all the electrons from the above electron configuration, 2+2+6+2+6+2+10+6+2+10+6+2+14+10+3=83. 1+ means losing 1 electron, having the same electron configuration of the noble gas, Xe. The atomic number of calcium is 20. The electron configuration of a "Ca"^(2+)" ion is "1s"^2"2s"^2"2p"^6"3s"^2"3p"^6". Caesium is a chemical element with atomic number 55 which means there are 55 protons and 55 The unpaired 4s electron allows copper to attract a magnetic field. Atomic #/ Electronic Symbol Configuration 55 Cs [Xe] 6s1 56 Ba [Xe] 6s2 57 La [Xe] 6s2 5d1 58 Ce [Xe] 6s2 5d1 4f1 59 Pr [Xe] 6s2 5d1 4f2 60 Nd [Xe] 6s2 5d1 4f3 Period 6, group 1. They all have an unpaired electron with an angular momentum quantum number, l=0. Electron configurations of elements beyond hassium (element 108), including those of the undiscovered elements beyond oganesson (element 118), are predicted. An electron configuration can quickly and simply tell a reader how many electron orbitals an atom has as well as the number of electrons populating each of its orbitals. Copper ions usually exists in either the +1 or +2 forms. 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