Electron configuration is the arrangement of electrons around the nucleus of an atom based on their energy level. Calcium comes the last and forms the smallest ion. 1 the arrangement of the elements (esabm). The periodic table is arranged in the order of increasing proton number. A nucleus of strong positive charge pulls its electron cloud towards itself tightly such that the latter would have a small radius. So we need the periodic trend for atomic radio. Each proton carries a +1 charge the more protons an atom or ion contains the stronger the attraction it poses on its electron cloud. We see that we have sodium, we have potassium, we have rubidium, we have cesium and we have lithium. And in our list of elements that we want to arrange. Its ion would be the largest among the five. And then we want to arrange these in order down to the smallest radius at the bottom. a group the elements become more reactive this is because the atomic radius. Phosphorus comes the first among the five species and contains the least number of protons. These explanations are written by Lido teacher so that you easily understand. Each proton carries a #+1# charge the more protons an atom or ion contains the stronger the attraction it poses on its electron cloud. And we know that going from left to right along the period the number of shells (Principle Quantum Number) remains constant and the number of protons (atomic number) increases, due to this increase in nuclear charge the valence electrons are more attracted towards the nucleus resulting in decreasing the atomic radii, Hence, the. A: Atomic radius of an element represents the distance of the nucleus from the outermost shell. All given elements belong to second period of periodic table. Positively-charged protons in the nuclei attract the negatively-charged electron cloud. Q: Arrange these elements in order of decreasing atomic radius: Cs, Sb, S, Pb, Se. Similarly, a phosphorus atom ( #Z=15#) gains #color(navy)("three")# electrons to form a #"P"^(color(navy)(3-))# anion that contains #15+3=18# electrons. For example, a neutral calcium atom ( #Z=20#) has #20# electrons it loses #color(purple)("two")# of them to form a #"Ca"^(color(purple)(2+)# cation, which would thus contain #20-2=18# electrons. All five ions have an equal number of electrons and therefore share the same electron configuration.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |