Hold Modern Chemistry Chapter 6.2 Section Quiz

If two covalently bonded atoms move closer than a distance of the bond length, the potential energy of the atoms:

• becomes negative

• decreases

• increases

• remains constant

• halves

Tags

NGSS.HS-PS1-4

The electrons involved in the formation of a covalent bond are:

• transferred from one atom to another

• found only in the s orbitals

• valence electrons

• in filled orbitals

Bond energy is the energy

• absorbed as a molecule forms

• change as atoms get closer together

• required to break a chemical bond and form separate, neutral atoms

• of two covalently bonded atoms.

Tags

NGSS.HS-PS1-4

Bond length between two bonded atoms is:

• twice the diameter of the molecular orbital

• the separation at which their potential energy is minimum

• the separation at which the motion of each atom stops

• the sum of the diameters of each of the two overlapping electron clouds

Which compound most likely has the greatest bond energy?

• HF; H-F bond length = 92 pm

• I₂; I-I bond length = 266 pm

• Cl₂; Cl-Cl bond length = 199 pm

• HCl; H-Cl bond length = 127 pm

The Lewis Structure of which of the following compounds does not follow the octet rule?

• NH₃

• BF₃

• CCl₄

• H₂O

In a double covalent bond,

• one atom has more than eight valence electrons

• one atom loses a pair of electrons

• two atoms share eight valence electrons

• two atoms share two pairs of electrons

Which of the following is NOT a resonance structure of SO₃?

• 
• 
• 
• 

How many double bonds are in the Lewis structure for hydrogen fluoride, HF?

• None

• One

• Two

• Three

• Impossible to tell

To draw a Lewis structure, it is NOT necessary to know:

• The length of the bonds

• The types of atoms in the molecule

• The number of valence electrons for each atom

• The number of atoms in the molecule