Many nuclides with atomic numbers greater than 83 decay by processes such a electron emission. Explain the observation that the emissions from these unstable nuclides also ormally include alpha particles.

The Explanation is described below:-

Explanation:

The purpose of the emission of an element with an atomic number higher than 83 mostly during the disintegration of the nucleus is that if the alpha particle is released, the recently established nuclei or the daughter would be closer to the stability band.

In other terms, in the case of an alpha particle explosion, the daughter nuclei would be more stable than the parent nuclei.

particles: Such particles are called alpha. They are basically divalent helium cations or helium nuclei with two protons and two neutrons. It is portrayed by

The Stability band is the area in the graph that is plotted between the number of protons and the number of protons representing the stable nucleus.

yes

explanation:

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hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.