Given below are two statements:Statement I: T | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) Statement $I$: The electronic configuration of $Na^{+}$ is $1s^{2} 2s^{2} 2p^{6}$,which is a stable noble gas configuration. Removing the second e

Vedclass · Accepted Answer

Both statement $I$ and statement $II$ are true

Vedclass · Answer

(A) Statement $I$: The electronic configuration of $Na^{+}$ is $1s^{2} 2s^{2} 2p^{6}$,which is a stable noble gas configuration. Removing the second electron from $Na^{+}$ requires a very high amount of energy. In contrast,$Mg^{+}$ has the configuration $1s^{2} 2s^{2} 2p^{6} 3s^{1}$,and removing the second electron results in a stable $Mg^{2+}$ ion $(1s^{2} 2s^{2} 2p^{6})$. Thus,the second ionisation enthalpy of $Na$ is much higher than that of $Mg$. Statement $I$ is true.Statement $II$: Both $O^{2-}$ and $F^{-}$ are isoelectronic species with $10$ electrons. The ionic radius of isoelectronic species decreases as the nuclear charge $(Z)$ increases. Since the atomic number of $O$ $(Z=8)$ is less than that of $F$ $(Z=9)$,the ionic radius of $O^{2-}$ is larger than that of $F^{-}$. Statement $II$ is true.

Similar Questions

Which of the following pairs of atomic numbers belongs to the same group in the periodic table?

Fill in the blanks given below:
$(i)$ The most widely used scale for measuring electronegativity is ........ .
$(ii)$ The similarity observed in periodic properties is known as .............. .
$(iii)$ The elements located in the middle of the periodic table form .......... type of oxides.

$(a)$ $Be$ and $Mg$ are alkaline earth metals.
$(b)$ $K^{+}$ has larger radii than $Ca^{2+}$.
$(c)$ All $d$-block elements are transition elements.
$(d)$ $H^{-}$ ion is larger than $F^{-}$.
Incorrect statement is/are

Identify the incorrect set$(s)$ among the following periodic trends:

Which of the following statements is correct regarding the following processes?
$(i) \, Cl$ $\xrightarrow{E.A.} Cl^{-} \, \, \, \, \, (ii) \, Cl^{-}$ $\xrightarrow{I.E.} Cl \, \, \, (iii) \, \, Cl$ $\xrightarrow{I.E.} Cl^{+} \, \, \, (iv) \, \, Cl^{+}$ $\xrightarrow{I.E.} Cl^{2+}$

Vedclass Test Series

Exam Paper Generator

Online Exam Module