Unit 5: Chemical Bonding

Is O₂ a compound or a molecule?

• Compound

• Molecule

• Both

H₂O is a:

• Compound

• Molecule

• Both

The chemical bond that forms when electrons are transferred is called:

• Ionic

• hydrogen

• covalent

The chemical bond that forms when electrons are shared is called:

• Ionic

• hydrogen

• covalent

When an atom loses or gains an electron it is called a(an)

• isotope

• compound

• ion

• molecule

Some elements combine chemically and no longer have the same ________________ they did before forming a compound.

• valence electons
• energy
• properties
• group number

A _________________ is composed of symbols and subscripts indicating the number of atoms of an element in a compound.

• Chemical Equation
• Chemical Reaction
• Synthesis Reaction
• Chemical Notation

Atoms gain lose, gain, or ______electrons to get a stable outer energy level.

• share
• split
• create
• destroy

A ____________is the force that holds atoms together in a compound.

• Chemical Formula
• Chemical Reaction
• Chemical Bond
• Synthesis Reaction

Which of the following BEST describes a chemical bond?

• A physical connection holding atoms together.

• A force holding atoms together.

• Two elements combined into a single substance.