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Categories >> Sciences >> Chemistry >> Inorganic Chemistry
 
 


 

 
 Organic Chemistry interview questions  Organic Chemistry Interview Questions (221)
 Inorganic Chemistry interview questions  Inorganic Chemistry Interview Questions (95)
 Analytical Chemistry interview questions  Analytical Chemistry Interview Questions (833)
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 Chemistry AllOther interview questions  Chemistry AllOther Interview Questions (65)
Question
why is the atomic radius of Mg2+ bigger than that of Na+?
 Question Submitted By :: Guest
I also faced this Question!!     Rank Answer Posted By  
 
  Re: why is the atomic radius of Mg2+ bigger than that of Na+?
Answer
# 1
as the mass no of Mg2+ is more than Na+ 
Is This Answer Correct ?    6 Yes 32 No
Sa
 
  Re: why is the atomic radius of Mg2+ bigger than that of Na+?
Answer
# 2
in periods atomic radius decreases with in creasing atomic
number.
 
Is This Answer Correct ?    1 Yes 21 No
Prasad
 
 
 
  Re: why is the atomic radius of Mg2+ bigger than that of Na+?
Answer
# 3
Its not. Both Na+ and Mg2+ have the same number of electrons
in a configuration emulating Neon, the difference is Mg has
more protons in the nucleus attracting the electrons inward
thereby making Mg have a SMALLER atomic radius.
 
Is This Answer Correct ?    37 Yes 4 No
Patrick
 
  Re: why is the atomic radius of Mg2+ bigger than that of Na+?
Answer
# 4
atomic radius of Mg2+ is not bigger.
the one with larger positive nuclear charge will have
smaller radius.
so its radius is small.
 
Is This Answer Correct ?    14 Yes 1 No
Sana.rampur
 
  Re: why is the atomic radius of Mg2+ bigger than that of Na+?
Answer
# 5
as in answer # 4 was explained... the question is wrong.

They both have 10 electrons with the configuration of Neon:

2s2 2p6 and empty 3 s


but Na+ has only 1 proton whereas Mg+2 has two--

therefore Mg+2 has a smaller atomic radius then Na+

This can be verified in any decent highschool chemistry book--


By the way, I'm a real chemist! Whoever marked any answer in
this page (except for # 4) as correct is INCREDIBLY WRONG
 
Is This Answer Correct ?    9 Yes 2 No
Pablo
 

 
 
 
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