Unit 8 Test Review

Given the balanced equation representing a reaction:
Cl₂(g) --> Cl(g) +Cl(g)

What occurs during this change?

• Energy is absorbed and a bond is broken

• Energy is absorbed and a bond is formed.

• Energy is released and a bond is broken.

• Energy is released and a bond is formed.

Given the balanced equation

I + I --> I₂

Which statement describes the process represented by this equation?

• A bond is formed as energy is absorbed.

• A bond is formed and energy is released.

• A bond is broken as energy is absorbed.

• A bond is broken and energy is released.

Which of these elements has an atom with the most stable outer electron configuration?

• Ne

• Cl

• Ca

• Na

When a sodium atom reacts with a chlorine atom to

form a compound, the electron configurations of the

ions forming the compound are the same as those in

which noble gas atoms?

• Krypton and neon

• Krypton and argon

• Neon and helium

• Neon and argon

The elements Li and F combine to form an ionic

compound. The electron configurations in this

compound are the same as the electron configurations

of atoms in Group

• 1

• 14

• 17

• 18

Which element has atoms with the greatest attraction

for electrons in a chemical bond?

• beryllium

• fluorine

• lithium

• oxygen

Which formula represents an ionic compound?

• H₂

• CH₄

• CH₃OH

• NaNH₄

Which substance contains bonds that involved the

transfer of electrons from one atom to another?

• CO₂

• NH₃

• KBr

• Cl₂

Which sample contains particles in a rigid, fixed,

geometric pattern?

• CO_2(aq)

• HCl_(g)

• H₂O_(l)

• KCl_(s)

Which formula represents an ionic compound?

• NaCl

• N₂O

• HCl

• H₂O