1- why is it difficult to measure the size of an atom? 2-what does the term atomic radius mean?

3-what is Ionization mean?

4- what exception exist in this trend?

5a-What trend evident in atomic radius as you proceed down a group of element?

5b-how does this trend progress as you move across a period?

6- define the term electron shielding?

7a- what effect does electrons shielding have on atomic radius? On ionization energy?

8- when an atom loses an electron, what is it's charge? What do you think happens to the atomic radius of the atom?

9- when an atom gains an electron, what is it's charge? What do you think happens to it's atomic radius?

10- what metal in period 6 has lowest melting point? The lowest boiling point?

Please ASAP

answer: your mm

explanation:

the answer to your question is c.

if you read the house of usher you should know that the house was haunted

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.