Question 7 of 10
2 Points
How does one recognize a periodic trend on the periodic table?
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A. Look for all elements with 2 electrons in any orbital.
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BCompare an element's properties to the properties of a noble gas,
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C. Look for predictable changes and patterns.
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D. Find elements in random positions of the periodic table.

indium, and thallium have three electrons i think

the ratio of the conjugate base to the acid required to attain the desired ph.

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.