Covalent Test

In a triple bond, two atoms share a total of ___ electrons.

• two

• three

• four

• six

Which of the following compounds has the least bond energy?

• bond length= 199 pm

• bond length= 227 pm

• bond length= 192 pm

• bond length= 166 pm

The electrons involved in the formation of a covalent bond are

• transferred from one atom to another.

• valence electrons.

• found only in s-orbitals.

• in filled orbitals.

In which pair do both compounds exhibit predominantly covalent bonding?

• KI and O₃

• SCl₆ and HF

• LiF and K₂O

• LiBr and Se₂O

Two atoms that have the same or very close electronegativities are expected to form

• no bonds

• polar covalent bonds

• nonpolar covalent bonds

• ionic bonds

Chose the molecule with the strongest bond.

• HF

• HCl

• HBr

• HI

Choose the molecule with the shortest bond.

• CO₂

• N₂

• _O3

• F₂

As the number of bonds between two atoms decreases, which one of the following increases?

• number of electrons between two atoms

• bond energy

• bond length

• bond strength

Which of the following molecules contains a double bond?

• CO₂

• NH₃

• H₂O

• N₂

Rank the following substances based on the amount of bond strength.

H-Cl bond length=76 pm, I-I bond length=166 pm, Cl-Cl bond length=250 pm, H-I bond length=289 pm

• HI > HCl > I2 > Cl2

• HCl > I2 > Cl2 > HI

• I2 > Cl2 > HCl > HI

• HCl > HI > I2 > Cl2