Calcium oxide electron configurations

Indicate the position of beryllium, magnesium, calcium, strontium, and barium in Mendeleev s periodic table of the elements, the electron configurations and size of their atoms, and their oxidation states. 

Figure 5.4 Electron Transfer in Calcium Oxide Figure 5.5 Electron Transfer and Electron Configurations for Calcium Oxide ...

Using complete electronic configurations for calcium and oxygen, show the transfer of electrons and the configurations of the resulting ions that lead to the formation of calcium oxide, CaO. 

There is a transfer of two electrons from the calcinm atom to the oxygen atom. Note that the resulting calcium ion (Ca ) has the argon electron configuration, the oxide ion (0 ) is isoelectronic with neon, and the componnd (CaO) is electrically neutral. 

Describe the formations of calcium fluoride, sodium oxide and aluminium oxide in terms of electron configurations of the atoms involved and the ions formed after electron transfer. 

Use a reliable source on the internet to find twelve successive ionization energies for calcium and vanadium. Plot logarithms (to the base 10) of the values. Relate the oxidation states and detailed electron configuration of each element to the graphs. 

With some remarkable exceptions, the organometallic compounds of group 2 are redox-inactive species that demonstrate a +2 oxidation state [1-6]. The cation achieves a noble gas configuration, while complexes of calcium, strontium and barium possess d° electron configurations. The ionic radii of the dications increase as the group is descended (Mg " < < Sr < Ba ), whereas the Pauling... 

The devices used for the EL and PL measurements were fabricated in the thin film sandwich configuration anode/polymer/cathode. The electronic structure of alkoxy derivatives of PPV has been studied via internal field emission [42], internal photoemission [76], cyclovoltammetric spectroscopy [159]) and photoelectron spectroscopy [160]. The data indicate that the bottom of the Tr -band and the top of the ir-band are at 3 eV and 5 eV respectively, with respect to the vacuum. Thus, relatively good hole and electron injection can be achieved by using transparent indium/tin-oxide (ITO) as the anode and calcium (Ca) or barium (Ba) as the cathode [42,161]. In practice, however, hole injection is very sensitive to the quality of the ITO. A thin layer (= 300 A) of conducting polymer provides excellent, reproducible hole injecting contacts [70,71,162]. 

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