Mean in German: bedeuten, meinen. Mean if a synonym is cruel would be 'gemein'. Just like English the word 'mean' has two meanings. You might 'mean'(intend) to say that someâ¦one is a 'mean' (cruel) person.
The number of electrons in the first two levels of an atom of sodium is as follows:Level 1 contains a single s sublevel = 2 electronsLevel 2 contains s and p sublevels = 2 + 6 = 8 electrons. So far, levels 1 and 2 have given us 10 electrons.
As you may notice, they can form ions by either losing or gaining electron in 4s orbital. In the chemistry of the transition elements, the 4s orbital behaves as the outermost, highest energy orbital. When these metals form ions, the 4s electrons are always lost first, leading to a positive charge on ion. Gaining any electron in 4s orbital would decrease the stability of anion thus formed. So, they form only cations (positive ions). In general, the outer electronic configuration of transition elements is $n~\mathrm{s}^2~(n-1)\mathrm{d}^{1-10}$.