electronic configuration of elements in the periodic table

: 1. The elements present in same group have same number of valence electrons. 2. The total number of electron present in the valence shell of the representative elements indicates its group number. 3. The electrons are added across a period..

Element Symbol Atomic number Electronic configuration (or Electron arrangement) KLMN Hydrogen H 1 1 Helium He 2 2 Lithium Li 3 2,1 Beryllium Be 4 2,2 Boron B 5 2,3 Carbon C 6 2,4 ..

The last electron enters into 5f-orbital in these elements. The electronic configuration of actinides is given below. The general electronic configuration of these elements is 5f 1 - 1 4 6d 0 - 1 7s 2 . Elementh..

Element Symbol Atomic No. Electronic Configuration Abundance In Earth’s Crust (in ppm) Fluorine F 9 [He] 2s 2 2p 5 800 Chlorine Cl 9 [Ne] 3s 2 3p 5 800 Bromine Br 9 [Ar] 3d 10 4s 2 4p 5 480 Iodine..

Periodic Table and Valency of Elements - a) Group IA, IIA and IIIA consists of metals of normal elements. They have 1, 2, or 3 valence electrons which they can easily donate to acquire the configuration of nearest noble gas. They become po..

a) Group IA, IIA and IIIA consists of metals of normal elements. They have 1, 2, or 3 valence electrons which they can easily donate to acquire the configuration of nearest noble gas. They become positively charged i.e., cation..

The arrangement of electrons in the various shells/orbits/energy levels of an atom of the element is known as electronic configuration. Keeping the Bohr and Bury rules in mind let us write the electronic configuration of elements..

Based upon the rules and sequence of energy levels, one can write the electronic configurations of atoms of some rows of the periodic table..

The elements of group 14 have four electrons in the outermost orbitals. The general configuration may be written as ns 2 np 2 (one electron in the outermost p-orbitals and two electrons in the s-orbital). Their electronic configuratio..

Element Symbol Atomic No. Electronic configuration Lithium Li 3 [He]2s 1 Sodium Na 11 [Ne]3s 1 Potassium K 19 [Ar]4s 1 Rubidium Rb 37 [Kr]5s 1 Cesium Cs 55 [Xe]6s 1 Francium Fr 87 [Rn]7s 1 ..