Lecture 17 - VSEPR

These flashcards cover key concepts and definitions related to VSEPR and Lewis structures, focusing on electron arrangements and molecular shapes.

What is represented by a solid line in Lewis structures?

Full bonds

What do dashed lines represent in a Lewis structure?

Partial bonds

How many electrons are needed for hydrogen to achieve a full valence shell?

2 electrons

What is the purpose of Lewis structures?

To show the connectivity of atoms in a molecule and the distribution of electrons and charges.

What does VSEPR stand for?

Valence Shell Electron Pair Repulsion

What is the effect of lone pairs on molecular shape compared to bonding electrons?

Lone pairs repel more strongly than bonding electrons.

What shape do five electron groups around a central atom form?

Trigonal bipyramidal arrangement

What molecular geometry is observed with six electron groups?

Octahedral arrangement

How do you determine the molecular polarity of a polyatomic molecule?

By analyzing the combination of individual bond dipoles to see if they cancel out.

What is the effect of symmetry on molecular polarity?

Symmetric molecules tend to be non-polar, while asymmetric molecules tend to be polar.