Chem: Chapter 4

Is the three-dimensional arrangement of atoms in a molecule

Molecular structure

The structure around a given atom is determined principally by
minimizing electron pair repulsions

Valence shell electron-pair repulsion (VSEPR) model

When there are four pairs of electrons around an atom, they
take up a

tetrahedral structure

In the presence of a lone pair, the molecular structure is a

trigonal pyramid

The arrangement of electron pairs is ........, but the
arrangement of ........ is not

tetrahedral & atoms

Bonding pairs are shared between two .....

nuclei

Lone pairs center around just ....... ......., and both electrons
choose that nucleus

one nucleus

When there are five electron pairs, the structure that
produces minimal repulsion is a ...... .......

trigonal bipyramid

The best arrangement for six pairs of electrons around a
given atom is the ...... ......

octahedral structure

While using the VSEPR model, a ..... ..... must be
considered as one effective pair

double bond

The ..... ...... acts as one center of electron density that
repels other electron pairs

double bond

A molecule that has a center of positive charge and a center
of negative charge is said to be ...... or to possess dipole
moment

dipolar

.... - Most electron-rich region

Red

..... - Most electron-poor region

Blue

Any ...... ...... with polar bonds will exhibit dipole
moments

diatomic molecule

It refers to the mixing of the native atomic orbitals to form
special orbitals for bonding

Hybridization

Electron pair is shared in an area centered on a line running
between the atoms

Sigma bond

Forms double and triple bonds by sharing electron pair(s) in the space above and below the σ bond using the unhybridized p orbitals

Pi bond

A .... ... ... is lower in energy than the atomic
orbitals from which it is composed

Bonding molecular orbital

An ..... ..... ..... is higher in energy than the
atomic orbitals from which it is composed

Antibonding molecular orbital

The number of .... .... will always be equal to the number of
atomic orbitals used to construct them

Molecular Orbitals

...... causes a substance to be attracted into the
inducing magnetic field
Associated with ...... electrons

Paramagnetism & unpaired

.... causes a substance to be repelled from the
inducing magnetic field
Associated with .... electrons

Diamagnetism & Paired

bond can be described as being localized

Sigma

Chem: Chapter 4

Is the three-dimensional arrangement of atoms in a molecule

The structure around a given atom is determined principally byminimizing electron pair repulsions

When there are four pairs of electrons around an atom, theytake up a

In the presence of a lone pair, the molecular structure is a

The arrangement of electron pairs is ........, but thearrangement of ........ is not

Bonding pairs are shared between two .....

Lone pairs center around just ....... ......., and both electronschoose that nucleus

When there are five electron pairs, the structure thatproduces minimal repulsion is a ...... .......

The best arrangement for six pairs of electrons around agiven atom is the ...... ......

While using the VSEPR model, a ..... ..... must beconsidered as one effective pair

The ..... ...... acts as one center of electron density thatrepels other electron pairs

A molecule that has a center of positive charge and a centerof negative charge is said to be ...... or to possess dipolemoment