Multiple Choice
Determine the number of electron groups for the following cation:AsBr2+.
998
views
4
rank
10. Chemical Bonding
Electron Geometry (Simplified)
Struggling with Introduction to Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
What is the electron-pair geometry around Se in (SeH2)?
A
Linear
B
Tetrahedral
C
Trigonal bipyramidal
D
Trigonal planar
Verified step by step guidance1
Identify the central atom in SeH\_2, which is selenium (Se).
Determine the number of valence electrons on selenium. Selenium is in group 16, so it has 6 valence electrons.
Count the number of bonding pairs and lone pairs around selenium. In SeH\_2, selenium forms two single bonds with hydrogen atoms, using 2 of its valence electrons, leaving 4 electrons (or 2 lone pairs) on selenium.
Use the VSEPR (Valence Shell Electron Pair Repulsion) theory to predict the electron-pair geometry. The total number of electron pairs around selenium is 4 (2 bonding pairs + 2 lone pairs). According to VSEPR, 4 electron pairs arrange themselves in a tetrahedral geometry to minimize repulsion.
Conclude that the electron-pair geometry around selenium in SeH\_2 is tetrahedral, even though the molecular shape (considering only atoms) might be bent.
2:25mWatch next
Master Electron Geometry (Simplified) Concept 1 with a bite sized video explanation from Jules
Start learningRelated Videos
Related Practice
Electron Geometry (Simplified) practice set
Problem sets built by lead tutorsExpert video explanations