NEETChemistryp Block Elements (Group 13 & 14)
What accounts for the small decrease in ∆ i H from Si to Ge to Sn?
Options
- AThe poor shielding effect of intervening d and f orbitals
- BThe increase in atomic number
- CThe increase in the number of valence electrons
- DThe presence of inner core electrons
Correct answer
A. The poor shielding effect of intervening d and f orbitals
Step-by-step solution
The the small decrease in ∆ i H from Si to Ge to Sn is due to the poor shielding effect of intervening d and f orbitals.