Shapes & Structures

 A lone pair is defined as

• A pair of bonding electrons
• One non-bonding electron
• A pair of non-bonding electrons
• A pair of electrons on the central atom

Molecules adjust their shapes to keep which of the following as far away as possible?

• Pairs of valence electrons (lone and those in bonds)

• Inner shell electrons
• Mobile Electrons
• Electrons closest to the nucleus

What is the VSEPR theory used to predict?

• Bond Strength
• Polarity
• Molecular Shape
• Electronegativity

Tags

NGSS.HS-PS2-6

Who could this molecule be?

• CH₄
• CO₂
• PCl₅
• BF₃

Tags

NGSS.HS-PS1-1

Which molecule below would have this shape?

• BF₃
• CH₄
• PCl₅
• CO₂

VSEPR stands for ________ theory.

• Valence Structure of Electron Pyramids and Regression
• Varied Structures of Electrons Paired and Replaced
• Varied Shell Energy of Protons and Radiation
• Valence Shell Electron Pair Repulsion

T or F: Lone pairs around the oxygen atom of a water molecule play no role in determining its molecular geometry?

• True
• False

Which shapes are altered by unshared pairs of electrons (also known as lone electron pairs)? 

• Bent and Pyramidal
• Trigonal Planar and Bent
• Tetrahedram and Bipyramidal
• Pyramidal and Linear

How many unshared pairs of electrons will a bent molecule have on the central atom?

• 1
• 2
• 3
• 4

Who could this be? (paddles represent lone electron pairs)

• CO₂
• NH₃
• H₂S
• CH₄

Tags

NGSS.HS-PS1-2