The London Dispersion force s a temporary attractive
force that results when the electrons in two adjacent atoms occupy positions
that make the atoms form temporary dipoles. And because of this, the London
Dispersion force is considered to be the weakest intermolecular force.
Answer:
Potassium-40 (40K) is a radioactive isotope of potassium which has a long half-life of 1.251×109 years. It makes up 0.012% (120 ppm) of the total amount of potassium found in nature.
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Potassium-40.
General
Natural abundance 0.0117(1)%
Half-life 1.251(3)×109 y
Parent isotopes Primordial
Decay products 40Ca (β−) 40Ar (EC, γ; β+)
Because Carbon has to make 4 bonds. However, it does makes 3 or 5 bonds in some cases. But, it is highly unstable under those conditions.
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