The electron configuration of scandium is: [Ar]3d1.4s2.
Shell Type EC: 2,8,5Quantum Shell EC: 1s22s22p63s23p3
Scandium (symbol, Sc) has 21 electrons. Its noble gas configuration is [Ar] 3d1 4s2
The halogen family, F,Cl,Br,I,As all have outer shells with 7 electrons
Because the inner shell already has completely filled electronic configuration.
One. Cesium has the electronic configuration of [Xe] 6s1
Periodic Table was constructed by using electronic configuration . Elements have same outer shell electronic configuration were in same group . So they have similar chemical properties . If an unknown element will register in future , its properties are predicted with the help of its outer shell configuration.
Electronic configuration of beryllium: 1s2.2s2.
The electronic configuration of magnesium (Mg) is (1s^2 2s^2 2p^6 3s^2), indicating that it has two electrons in its outermost shell. Oxygen (O), on the other hand, has the electronic configuration (1s^2 2s^2 2p^4), with six electrons in its outer shell. This configuration explains magnesium's tendency to lose two electrons to achieve a stable octet, while oxygen typically gains two electrons to fill its outer shell.
Stable electronic configuration is when the valence shell of an element is completely filled (8 electrons) whereas unstable electronic configuration is when the valence shell of an element is not completely filled
The electronic configuration of iodine is: [Kr] 4d10 5s2 5p5.
The element that forms a 2+ ion with the same electronic configuration as Ar is Calcium (Ca). When Calcium loses two electrons, it attains the same electronic configuration as argon by having a full outer shell of electrons.
1s2 2s2 2p2