The number of alkali metal(s),from Li,K,Cs,Rb | vedclass

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

Question

(C) The ionization enthalpies of the given alkali metals are: $Li \approx 520 \ kJ \ mol^{-1}$,$K \approx 419 \ kJ \ mol^{-1}$,$Rb \approx 403 \ kJ \

Vedclass · Accepted Answer

$2$

Vedclass · Answer

(C) The ionization enthalpies of the given alkali metals are: $Li \approx 520 \ kJ \ mol^{-1}$,$K \approx 419 \ kJ \ mol^{-1}$,$Rb \approx 403 \ kJ \ mol^{-1}$,and $Cs \approx 376 \ kJ \ mol^{-1}$.Among these,$Li$,$K$,and $Rb$ have ionization enthalpy greater than $400 \ kJ \ mol^{-1}$.Regarding the formation of stable superoxides $(MO_2)$,only the larger alkali metals $K$,$Rb$,and $Cs$ form stable superoxides.Comparing both conditions,only $K$ and $Rb$ satisfy both criteria (ionization enthalpy $> 400 \ kJ \ mol^{-1}$ and formation of stable superoxide).Therefore,the number of such metals is $2$.

The number of alkali metal$(s)$,from $Li$,$K$,$Cs$,$Rb$ having ionization enthalpy greater than $400 \ kJ \ mol^{-1}$ and forming stable super oxide is $.......$

Similar Questions

By which method can the concentration of alkali metals be determined?

Which among the following elements has only one electron in the valence shell?

Sodium metal cannot be stored under

Among the following,the incorrect statement is

Which of the following carbonate salts is soluble due to a high entropy change?

Vedclass Test Series

Exam Paper Generator

Online Exam Module