Lesson 4.3 Ionic Bonding

Which compound contains ionic bonds?

• CO₂

• NH₃

• KBr

• Cl₂

When ionic bonds are formed, metallic atoms tend to

• lose electrons and become negative ions

• lose electrons and become positive ions

• gain electrons and become negative ions

• gain electrons and become positive ions

Which element forms an ionic compound when it reacts with oxygen?

• K

• Kr

• S

• Br

The bonds in BaO are best described as

• covalent, because valence electrons are shared

• covalent, because valence electrons are transferred

• ionic, because valence electrons are shared

• ionic, because valence electrons are transferred

Which elements combine by forming an ionic bond?

• sodium and potassium

• sodium and oxygen

• carbon and oxygen

• carbon and sulfur

Which element forms an ionic compound when it reacts with lithium?

• K

• Kr

• Fe

• Br

A solid substance was tested in the laboratory. The test results are listed below.

• dissolves in water

• electrolyte

• melts at a high temperature

Based on these results, the solid substance could be:

• Cu

• C

• CuBr₂

• C₆H₁₂O

A barium atom attains a stable electron configuration when it bonds with

• one chlorine atom

• two chlorine atoms

• one sodium atom

• two sodium atoms

A neutral atom with the electron configuration 2-6 would most likely form a bond with an atom having the configuration

• 2

• 2-8

• 2-8-2

• 2-8-8