Electronic Configuration and Position in the Periodic Table

The electronic configuration of an atom of an element refers to the arrangement of electrons in the various energy levels or shells around the nucleus. The position of an element in the periodic table is determined by its electronic configuration. The periodic table is arranged in such a way that elements with similar electronic configurations are placed in the same group. This is because the electronic configuration of an atom determines its chemical and physical properties.

Example: Sodium (Na)

Sodium is a chemical element with the symbol Na and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is a member of the alkali metal group and is placed in group 1 of the periodic table. Its electronic configuration is:

1s2 2s2 2p6 3s1

Explanation:

The electronic configuration of sodium can be broken down into its constituent energy levels or shells. The first shell contains 2 electrons, the second shell contains 8 electrons, and the third shell contains 1 electron. The electronic configuration of sodium indicates that it has only one electron in its outermost shell, which is the 3s shell. This electron is easily removed from the atom, making sodium a highly reactive metal.

Relation between Electronic Configuration and Position in the Periodic Table

The position of an element in the periodic table is determined by its electronic configuration. Elements with similar electronic configurations are placed in the same group. The electronic configuration of an atom determines its chemical and physical properties. For example, elements in the same group have similar chemical properties because they have the same number of valence electrons. The valence electrons are the outermost electrons in an atom, and they are responsible for the chemical behavior of an element.

In conclusion, the electronic configuration of an atom of an element is related to its position in the periodic table. The periodic table is arranged in such a way that elements with similar electronic configurations are placed in the same group. This arrangement helps to predict the chemical and physical properties of an element based on its position in the periodic table. Sodium is an example of an element whose electronic configuration determines its position in the periodic table and its chemical and physical properties.

Element belonging to same group have same no of shell