Which of the following statements is incorrec | vedclass

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

Question

(A) $1$. In $Sc$ $(Z=21)$,the electronic configuration is $[Ar] 3d^1 4s^2$. The effective nuclear charge $(Z_{eff})$ is calculated as $Z - \sigma$. Du

Vedclass · Accepted Answer

Effective nuclear charge for electrons of $3d$ and $4s$ subshells is the same in $Sc$.

Vedclass · Answer

(A) $1$. In $Sc$ $(Z=21)$,the electronic configuration is $[Ar] 3d^1 4s^2$. The effective nuclear charge $(Z_{eff})$ is calculated as $Z - \sigma$. Due to different shielding effects of $3d$ and $4s$ electrons,their $Z_{eff}$ values are not the same. Thus,statement $A$ is incorrect.$2$. The increase in $Z_{eff}$ across a period is generally $0.65$ per step,which is a standard observation in Slater's rules,making statement $B$ correct.$3$. For $H^-$ $(1s^2)$ and $He$ $(1s^2)$,the screening constant $\sigma$ for one electron due to the other is $0.30$. Thus,statement $C$ is correct.$4$. $Z_{eff}$ is fundamentally dependent on the shielding constant,which varies with the principal quantum number $(n)$ and orbital type,making statement $D$ correct.

Which of the following statements is incorrect?

Similar Questions

The core charge on oxygen is equal to $-$

If $Z_{eff}$ of $B$ is $2.6$,then the value of $Z_{eff}$ of oxygen and fluorine will be :-

Among the following pairs of orbitals,which orbital will experience the larger effective nuclear charge?
$(i)$ $2s$ and $3s$
$(ii)$ $4d$ and $4f$
$(iii)$ $3d$ and $3p$

The order of screening effect among $s, p, d$ and $f$-orbitals of a given shell of an atom on its outer shell electrons is

If $Z_{eff}$ of boron is $x$,then $Z_{eff}$ of oxygen will be

Vedclass Test Series

Exam Paper Generator

Online Exam Module