logo

Ask Questions, Get Answers

 
X
 Search
Want to ask us a question? Click here
Browse Questions
Ad
0 votes

Which of the following statements are incorrect?

(1) Na$^{+}$, Mg$^{2+}$ and Al$^{3+}$ are all isoelectronic

(2) Ionic radius of K$^{+}$ is larger than that of Cl$^{-}$ even though they are isoelectronic

(3) Anions are always larger than the neutral atoms from which they are derived

(4) Cations are always larger than the neutral atoms from which they are derived

$\begin{array}{1 1} \text{Only (2) is incorrect.} \\ \text{(2) and (4) are incorrect} \\ \text{(1), (2) and (3) are incorrect} \\ \text{(1), (3) and (4) are incorrect } \end{array} $

Can you answer this question?
 
 

1 Answer

0 votes
Answer (2) and (4) are incorrect.
Ionic radius of K$^{+}$ is larger than that of Cl$^{-}$ even though they are isoelectronic:
$\quad$ K$^{+}$ is a cation and has a nuclear charge 19. Cl$^{-}$ is an anion with a nuclear charge of 17.
$\quad$ Due to higher nuclear charge, K$^{+}$ is smaller even though both are isoelectronic.
Cations are always larger than the neutral atoms from which they are derived
$\quad$ Positively charged ions are always smaller than the neutral atoms from which they are formed.
$\quad$ As the magnitude of the positive charge increases on isoelectronic ions, their size decreases.
answered Jul 23, 2014 by balaji.thirumalai
 

Related questions

Ask Question
student study plans
x
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App
...