The valve der Waals forces increases v the increase in the size of the atom, and therefore, in general, the boiling and melting points increase from He come Rn. Argon has actually larger mass 보다 helium and also has larger dispersion forces. Due to the fact that of bigger size, the external electrons are less tightly held in the larger atoms so that instantaneous dipoles are an ext easily induced resulting in greater interaction in between argon atoms. Therefore, the boiling point of Aris much more than that of He.
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Let's understand. Why space gone balls in ~ a higher temperature in the Neon, Neon has actually 10 protons in that is nucleus. Argon has 18 protons. This, um, in the Adam Argon has eight extra electron in a an ext diffuse electron cloud. The electron cloud the argon is hence larger and much more polarized, maybe able come express mawr inter molecular pressures Vander Waals forces, which outcomes in a greater boiling allude due come these increase forces. Due to this, the boiling allude of argon is greater are gone. We have the right to see the boiling point is 87.2 Kelvin's, vice versa, a neon and spoiling point is 24.5.
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