Hello Guys, Today we are going to discuss a very important topic for IIT jee Mains, Advance, NEET and AIIMS from Periodic table, its all about Electronegativity, their application and problems based on it.
Basically, electronegativity refers to how hard the nucleus of an atom pulls on electrons in its orbit. By “bonding pair of electrons,” that just means that in a chemical bond between two atoms, be it ionic or covalent, the bonding atom with greater electronegativity will pull the shared electrons closer to itself.
The fundamental reason behind this is that the positive nucleus attracts the negative electrons. The more positive charge in the nucleus, the greater the electronegativity. That’s only one part of the equation though.
The other depends on how many shells the atom has. The more shells, the farther away from the positive nucleus the outermost electrons will be, and thus the weaker the attraction.
A highly electronegative atom will have an ideal combination of large positive charge and few shells. That’s why in the periodic table, the most electronegative atoms are to the top right. Going to the right of the table = more positive charge, and going up = fewer shells.
Electronegativity is important cause the difference in electronegativity between two bonding atoms determines whether it is a covalent or ionic bonds. Covalent bonds have a small difference in electronegativity (less than 1.9), while ionic bonds have a large difference (greater than 1.9).
Other Details on the topic has been deal in details inside the lecture. Hope it will be extremely helpful for aspirants.
Team IITian explains
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