Slater 19s rules provide a method for calculating the shielding, S, and Zeff exp

Question

Slater 19s rules provide a method for calculating the shielding, S, and Zeff experienced by a particular electron in an atom. Slater assigns a shielding value of_______ to electrons with the same n-value, assuming that s and p electrons shield each other to the same extent. However, because__________ electrons have a finite probability of being very close to the nucleus, they shield________ electrons more than________ electrons shield them. To account for this difference, assign a slightly larger shielding value to______ electrons and a slightly smaller shielding value to the________ electrons. This will produce a slightly greater S and smaller Zeff for______ electrons than for______ electrons with the same n-value.

0.35

0.85

1.0

s

p

Explanation / Answer

Slater 19s rules provide a method for calculating the shielding, S, and Zeff experienced by a particular electron in an atom. Slater assigns a shielding value of__0.35_____ to electrons with the same n-value, assuming that s and p electrons shield each other to the same extent. However, because__(n-1)s,(n-1)p________ electrons have a finite probability of being very close to the nucleus, they shield___ns,np,nd_____ electrons more than__(n-1)d______ electrons shield them. To account for this difference, assign a slightly larger shielding value to____(n-1)s,(n-1)p__ electrons and a slightly smaller shielding value to the__(n-1)d______ electrons. This will produce a slightly greater S and smaller Zeff for___ns,np___ electrons than for__nd____ electrons with the same n-value.

The explanation is simple; ns and np electrons can penetrate closer to the nucleus because of the more compact shape of the ns and np orbitals. The nd orbitals are diffused and hence, any electron in a nd orbital will experience greater shielding and hence lower Zeff.

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.