Electronegativity
Süžeeskeem Tekst
- Good Evening Ladies and Gentlemen, and welcome aboard to the Late Night Fusion Atoms, and today's topic is electronegativity.
- So what exactly is electronegativity. Well electronegativity is the energy required to attract a electron from neighboring atoms.
- The trend that is shown across a period in electronegativity is the increased amount of electronegativity going from left to right. To prove this trend we can compare K and Fe. K is more towards the left and has a electronegativity of 0.82, while Fe is towards the left and has an electronegativity of 1.83. This proves our point that if an element is more towards the right, then the electronegativity will be higher.
- There is another trend present in electronegativity, one that decreases going down a group in periodic table. This happens because more energy levels are present, but they are further away from the nucleus, therefore the distance is greater. To prove this trend we can compare Li and K. Li is towards the top and has the electronegativity of 0.98. K is towards the bottom and has the electronegativity of 0.82.
- Like how I described how if the energy levels increase, the electronegativity decreases, this is called shielding. Shielding is when there are multiple energy levels that shield the electrons from pulling inwards into the nuclei. This lowers the electronegativity because less electronegativity force is able to reach outwards.
- Coulombic attraction also plays a key role in electronegativity. Coulombic attraction will take 2 atoms. If the atoms have a electronegativity of greater than 2, then electrons will move to the atom with the greater electronegativity and then one of the 2 atoms will become a cation and the other will become a anion.
- The reason behind having trends that decrease down a group is because the atomic radius is increasing, which creates a lower force to pull the electrons away from other atoms.
- The main reason we have the trends that increase and go across a period is because the nuclear charge is increasing as you move towards the right side, but the shielding is increasing at a slower pace. This means that the atoms have more electronegativity energy to attract valence electrons.
- Alright guys that's it for today! and remember its Late Night Fusion Atoms, every Tuesdays and Thursdays on BoB Network.
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