The graduation of the electronegativity of the elements in the periodic table

Electronegativity

The electronegativity increases in the periods and decreases in the groups .

The electronegativity is the ability of the atom in the covalent molecule to attract the electrons of the chemical bond towards itself , There is an inverse relationship between the atomic size of the atom of an element , and its electronegativity in the modern periodic table  .

In periods in the modern periodic table . You should know that the electronegativity increases by increasing the atomic number ( from left to right ) . The electronegativity for the elements of the same period is directly proportional to the atomic number .

In groups in the modern periodic table , It is very important to know that the electronegativity decreases by increasing the atomic number ( from up to down ) .The electronegativity for the elements of the same group is inversly proportional to the atomic number .

The inert gases have not the electronegativity as they do not enter in the chemical reaction under the normal conditions .

The difference in the electronegativity between the elements forming the compound molecules which determines the kind of the bond between the elements if it is ionic bond or covalent bond .

The difference in the electronegativity between the elements forming the covalent molecules which measures the polarity of these molecules , So , the covalent compounds are classified into the polar compounds and the non-polar compounds .

The polar compounds are the covalent compounds in which the difference in the electronegativity between their elements is relatively high .

When the difference in the electronegativity between the elements of a covalent compound molecule equals zero , the bond in this molecule is called the pure covalent bond . As in oxygen molecule and hydrogen molecule .

The attempts of the elements classification

The description of the modern periodic table

Modern periodic table and classification of Elements

Chemical combination , Types of bonds ( Chemical bonds & Physical bonds )

You may also like...

Leave a Reply

Your email address will not be published. Required fields are marked *