van der Waals force
Words nearby van der Waals force
MORE ABOUT VAN DER WAALS FORCE
What is van der Waals force?
Van der Waals force is a weak attractive force between nonpolar atoms or molecules. It’s caused by one atom or molecule having a high concentration of electrons and another having a low concentration of electrons.
When the electrons of an atom are positioned so that one side of the atom has a larger group of electrons than the other, the atom temporarily becomes a dipole, meaning it has an end that is less negatively charged than the other.
This temporary dipole causes other atoms to be attracted to the less negative end of the atom. This attraction causes the other atoms’ electrons to group up and those atoms become dipoles as well. The result is a chain reaction of atoms becoming dipoles and attracting other atoms. The attractive force between these atoms is called van der Waals force.
As far as chemical bonds go, van der Waals force is among the weakest. Other types of bonds, such as covalent or ionic bonds, involve the actual sharing or exchanging of electrons rather than having them slowly gravitate toward each other.
Why is van der Waals force important?
Van der Waals force is named for Dutch physicist Johannes Diderik van der Waals, who theorized that atoms must have some kind of intermolecular forces that attract them to each other. He based his theory on the fact that elements with different numbers of electrons have different boiling points and can even be at different phases of matter at room temperature.
Van der Waals force is the reason different elements have different boiling and melting points. The stronger the force between atoms, the more energy (heat) you need to break apart their bonds.
For example, iodine has a higher melting point than chlorine because iodine has more electrons than chlorine does. The more electrons an atom has, the more likely it can become a dipole and thus have a higher frequency of van der Waals force. In the case of iodine, the high instance of van der Waals force causes iodine to be a solid at room temperature, while chlorine is a gas at room temperature.
Did you know … ?
Van der Waals force occurs in every type of molecule, including polar molecules. However, polar molecules are able to form much stronger types of bonds due to their electrical charges.
What are real-life examples of van der Waals force?
This image gives a simple example of how van der Waals forces occur. You can see that the positioning of the electrons in the cloud leads to attractive force.
Van der Waals force is a force that bonds molecules together.
A gecko's foot on glass 🦎 Van der Waals force (distance-dependent interaction between atoms) takes place between the finely divided hairs on the toes and the glass helps the gecko stay in place. pic.twitter.com/1Ycvq3LHVR
— Royal Institution (@Ri_Science) July 29, 2021
The magic which holds the hair to any surface is called -Van der Waals force. pic.twitter.com/ycwMnhExAQ
— RealScientists | Caroline (@realscientists) May 9, 2018
What other words are related to van der Waals forces?
True or False?
A van der Waals force is the result of a concentration of protons in one atom being attracted by a low amount of protons in another.
How to use van der Waals force in a sentence
Yet for a vivid decade or so, sleaze was, somewhat paradoxically, a force for literacy and empowerment.
Shortly after dawn, there was another outbreak of deadly force.
And Air Force assessors are the first to say such imaging never tells the whole story.Pentagon Doesn’t Know How Many People It’s Killed in the ISIS War|Nancy A. Youssef|January 7, 2015|DAILY BEAST
Detectives with a fugitive task force caught up with Polanco and a friend on a Bronx street in the early afternoon.
The Pentagon said Faal served in the Air Force for seven years, during which time he became a U.S. citizen.The Shadowy U.S. Veteran Who Tried to Overthrow a Country|Jacob Siegel|January 6, 2015|DAILY BEAST
The Goliath wouldn't answer; the Dublin said the force was coming off, and we could not get into touch with the soldiers at all.Gallipoli Diary, Volume I|Ian Hamilton
For this use of the voice in the special service of will-power, or propelling force, it is necessary first to test its freedom.Expressive Voice Culture|Jessie Eldridge Southwick
But you are mistaken in thinking the force west consists of the entire Merrill Horse.The Courier of the Ozarks|Byron A. Dunn
She and her younger sister, Janet, had quarreled a good deal through force of unfortunate habit.The Awakening and Selected Short Stories|Kate Chopin
Pierre Van Cortlandt, a distinguished revolutionary patriot, died at his seat at Croton river, aged 94.The Every Day Book of History and Chronology|Joel Munsell