Pre Test Polarity

____ refers to the ability of an atom in a molecule to attract shared electrons.

• Electron affinity

• Electronegativity

• Ionization energy

• Electromotive force

Which of the following statements is TRUE about polar bonds?

• They are present in metals.

• They are responsible for the formation of ionic compounds.

• They always result to the formation of polar molecular compounds.

• They may result to nonpolar covalent compounds depending on molecular geometry.

What type of chemical bond holds the atoms of water molecule together?

• Hydrogen bond

• Ionic bond

• Polar covalent bond

• Nonpolar covalent bond

Which of the following molecule is nonpolar?

• NaCl

• HCl

• CO₂

• NH₃

What is the electronegativity difference of C - O?

• 0

• 0.5

• 1.0

• 1.5

Supposedly a hypothetical molecule has an electronegativity difference of 0.5,

what is the type of chemical bond present?

• Ionic

• Hydrogen

• Polar covalent

• Nonpolar covalent

What is the molecular shape of BeF3?

• Linear

• Trigonal

• Tetrahedral

• Trigonal bipyramidal

A molecule can have a polar bond and still be nonpolar overall. The statement

is ___

• True

• False

• Maybe

A polar covalent bond would form in which of the following pairs of atoms?

• Cl-Cl

• Mg-O

• N-H

• C-S

A molecule shape is a three-dimensional arrangement of atoms or bonding groups around a central atom. The molecular shape is governed by the valence shell electron repulsion (VSEPR) theory.

• The first and second statements are true.

• The first and second statements are false.

• The first statement is true while the second statement is false.

• The first statement is false while the second statement is true.