What happens to the nucleus of an atom during nuclear fission?

a. it absorbs another nucleus
b. it splits into two pieces of similar size
c. it spilts into one large and one small piece
d. it absorbs and election, proton, or alpha particle

B. it splits into two pieces of similar size

Explanation:

Nuclear fission is a process in physics that consists of dividing the nucleus of an atom considered unstable into two smaller nuclei of similar size by bombarding particles like neutrons.

This process is an exothermic chemical reaction and occurs when there is a large release of energy. It is considered a form of nuclear transmutation, because the generated fragments are not of the same element as the isotope that generated them.

indium, and thallium have three electrons i think

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.