The strength of chemical bonds varies considerably ; there are " strong bonds " such as covalent or ionic bonds and " weak bonds " such as dipole – dipole interactions, the London dispersion force and hydrogen bonding.

* London dispersion force, an instantaneous induced dipole-induced dipole

* Instantaneous dipole-induced dipole forces or London dispersion forces.

Otherwise known as quantum-induced instantaneous polarization or instantaneous dipole-induced dipole force, the London dispersion force is caused by correlated movements of the electrons in interacting molecules.

The induction-interaction force is far weaker than dipole-dipole interaction, but stronger than the London dispersion force.

# REDIRECT London dispersion force

* force between two instantaneously induced dipoles ( London dispersion force ).

London dispersion forces, named after the German-American physicist Fritz London, are weak intermolecular forces that arise from the interactive forces between instantaneous multipoles in molecules without permanent multipole moments.

London dispersion forces are also known as dispersion forces, London forces, or instantaneous dipole – induced dipole forces.

This is due to the increased strength of the intermolecular forces — from London dispersion to dipole-dipole interaction because of the increased polarity.

As the high electronegativity of fluorine reduces the polarizability of the atom, fluorocarbons are only weakly susceptible to the fleeting dipoles that form the basis of the London dispersion force.

The reduced participation in the London dispersion force makes the solid polytetrafluoroethylene ( PTFE ) slippery as it has a very low coefficient of friction.

The dispersion of Scalvini and Ugoni that took refuge at Geneva and others of the proscribed that proceeded to London added to the progress which Carbonarism was making in France, suggested to General Guglielmo Pepe the idea of an international secret society, which would combine for a common purpose the advanced political reformers of all the European States.

* London dispersion forces, weak intermolecular forces

The long-range part is due to London dispersion forces

London dispersion forces ( LDF, also known as dispersion forces, London forces, instantaneous dipole – induced dipole forces, or loosely van der Waals forces ) is a type of force acting between atoms and molecules.

Additionally an approximation, named after Albrecht Unsöld, must be introduced in order to obtain a description of London dispersion in terms of dipole polarizabilities and ionization potentials.

Greater London was formally created by the London Government Act 1963, which took force on 1 April 1965, replacing the former administrative counties of Middlesex and London, adding the City of London, which was not under the London County Council, and absorbing parts of Kent, Surrey, Essex and Hertfordshire.

The support given by the Highland clans to the Jacobite rebellion led London to act decisively after harshly suppressing the rebellion in 1746: the new policy was to systematically destroy the old clan system and to encourage or force the chiefs into becoming modern landlords.

The three colleges published, at infrequent intervals, pharmacopoeiae, the London and Dublin editions having the force of law.

" The Lord Mayor, Sheriffs and Aldermen of the City, treated their King with a collation under a tent, placed in St. George's Fields ; and five or six hundred citizens cloathed in coats of black velvet, and ( not improperly ) wearing chains about their necks, by an order of the Common Council, attended on the triumph of that day ;... and those who had been so often defeated in the field, and had contributed nothing either of bravery or policy to this change, in ordering the souldiery to ride with swords drawn through the city of London to White Hall, the Duke of York and Monk leading the way ; and intimating ( as was supposed ) a resolution to maintain that by force which had been obtained by fraud.

Both weapons are in the Tower of London Armoury and Horace Ford writing in 1887 estimated them to have a draw force of 280 to 320 N ( 65 to 70 lbf ).

With the support of Prince Louis the French Heir and of King Alexander II of the Scots, they entered London in force on 10 June 1215, with the city showing its sympathy with their cause by opening its gates to them.

In 1965, the London Government Act 1963 came into force merging the boroughs of Malden & Coombe and Surbiton with Kingston upon Thames to form the Royal Borough of Kingston upon Thames.

Besides Arne, the other dominating force in English opera at this time was George Frideric Handel, whose opera serias filled the London operatic stages for decades, and influenced most home-grown composers, like John Frederick Lampe, who wrote using Italian models.

In London, night watchmen were the first paid law enforcement body in the country, augmenting the force of unpaid constables.

While the Act had been in force only one official newspaper existed ; the London Gazette, published by the government.

Stephen returned to London but received news that Ranulf, his brother and their family were relaxing in Lincoln Castle with a minimal guard force, a ripe target for a surprise attack of his own.

After the fall of France in 1940, Hollywood drove fashion in the United States almost entirely, with the exception of a few trends coming from war torn London in 1944 and 1945, as America's own rationing hit full force, and the idea of function seemed to overtake fashion, if only for a few short months until the end of the war.

* June 19, 1829 – Robert Peel's Metropolitan Police Act establishes the Metropolitan Police Service in London, the first modern police force.

* June 19 – Robert Peel's Metropolitan Police Act establishes the Metropolitan Police Service in London, the first modern police force.

The result was that I found myself in the ridiculous position of having made a formal engagement by letter for the next week, only two days before my departure from London.

The corporation voted on September 27, 1598, that Quiney should ride to London about the suit to Sir John Fortescue, chancellor of the Exchequer, for discharging of the tax and subsidy.

He had been in London for several weeks when he wrote to Shakespeare on October 25.

Baker wrote: `` I tooke order with Sr. E. Grevile for the payment of Ceartaine monei beefore his going towardes London.

He listed what he had spent for `` My own diet in London eighteen weeks, in which I was sick a month ; ;

He was in London `` searching records for our town's causes '' in 1600 with young Henry Sturley, the assistant schoolmaster.

As a naturalist living for two years at the headwaters of the Amazon, he had collected specimens for Mexican museums, and he had taken to the London zoo a live quetzal, the sacred bird of the old Mayans.

Mr. Burlingham, -- `` C.C.B. '' -- wrote to me once about an old friend of mine, S. K. Ratcliffe, whom I had first met in London in 1914 and who also came out for a week-end in Weston.

Lewis gave him a guidebook tour of London and, motoring and walking, took him to Stratford, but the London stay was for only ten days, and on the twentieth they took the train for Southampton, where they spent the night for an early morning Channel crossing.

The British ships rolled at anchor, sent out picket boats and waited for orders from London.

Dickens, for excellent psychological reasons, never fully reveals Magwitch's felonious past, but Pip, at the convict's climactic reappearance in London, shrinks from clasping a hand which he fears `` might be stained with blood ''.

Coeditors are J.D.H. Donnay, G. E. Cox of Leeds University, and Olga Kennard of the National Council for Medical Research, London.

Britain's plans to press Russia for a definite cease-fire timetable was announced in London by Foreign Secretary Lord Home.

And please it did, in every sense of the word, for it had the audience shouting much of the time in a manner far from typical of London audiences.

With this movie-to-be in London, and new faces about her there, she would soon be a more tranquil, a wiser person, all the better for her stay out here.

A 1945 radio series of at least 13 original half-hour episodes ( none of which apparently adapt any Christie stories ) transferred Poirot from London to New York and starred character actor Harold Huber, perhaps better known for his appearances as a police officer in various Charlie Chan films.

: Pontifical Institute for Mediaeval Studies, 1984, and Ibn Sina and Mysticism, Remarks and Admonitions: Part 4, London: Kegan Paul International, 1996.

Wakefield had read accounts of Australian settlement while in prison in London for attempting to abduct an heiress, and realised that the eastern colonies suffered from a lack of available labour, due to the practice of giving land grants to all arrivals.