CHAPTER 7 DK014

In drawing Lewis structure, a single line (single bond) between two elements represents

• A shared pair of electrons

• An octet of electrons

• An unshared pair of electrons

• Transfer of an electron

The basic principle in the formation of electrovalent bond is

• the sharing of electrons which leads to the sharing of atomic orbitals

• the transfer of electrons which leads to the formation of ions of opposite charges.

• the formation of positive ions which are bonded together in the negative charge of electron cloud.

• the generation oF instataneous dipole moment arising from the differences of electron affinities of two different atoms.

Which of the following statements regarding chemical bonding is correct?

• All atoms must attain octet configuration after bond formation

• Bond can only be formed between atoms of metals and atoms of non-metals

• All chemical bonds are electrostatic in nature

• The intermolecular forces must always be stronger than intramolecular forces.

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

A covalent bond usually forms between

• a metal and a nonmetal

• either metals or nonmetals

• two metals

• two nonmetals

This molecule has______bonds and is a _________molecule

• non-polar; non-polar

• polar; non-polar

• polar; polar

• non-polar; polar

Which one of the following is the correct bond angle between atoms adopting a trigonal planar geometry?

• 180^o

• 109.5^o

• 90^o

• 120^o

What is the molecular shape of SF₆ (Z for S = 16, F=9)

• Trigonal planar

• Tetrahedral

• Linear

• Octahedral

VSEPR stands for

• Valid Shell Electricity Program Remedy

• Valence Shell Electron Pair Repulsion

• Velocity Sustaining Electron Proton Review

• Valence Shell Electricity Proximal Repulsion

What is the VSEPR theory used to predict?

• Bond Strength

• Polarity

• Molecular Shape

• Electronegativity