Chapter 2: Lessons 3 & $ REVIEW

The force that holds 2 atoms together is called a ________________.

• Chemical Reaction
• Chemical Bond
• Diatomic Chemical
• Glue

Which of the following is NOT an example of a chemical reaction?

• Wood Burning
• A cake baking in an oven
• Melting Ice Cream
• Mixing Vinegar and Baking Soda

How many atoms of Carbon are in one molecule of table sugar (C₁₂H₂₂O₁₁) ?

• 12
• 22
• 11
• 1

What are the reactants in the chemical equation pictured?

• CH₄ and CO₂
• CH₄ and O₂
• CO₂ and H₂O
• O₂ and H₂O

What are the products of the chemical reaction pictured?

• CH₄ and CO₂
• CH₄ and O₂
• CO₂ and H₂O
• O₂ and H₂O

What is the large number written before a chemical formula called?

• Coefficient
• Subscript
• Reactant
• Product

What is the small number written after a chemical symbol called?

• Coefficient
• Subscript
• Product
• Reactant

What is a shorthand notation that represents a compound or molecule called?

• Chemical Equation
• Chemical Formula
• Chemical Reaction
• Chemical

According to the law of conservation of mass...

• sometimes atoms are lost
• sometimes atoms are gained
• atoms are never lost nor gained
• atoms are lost and gained

In an exothermic reaction energy is ...

• released
• absorbed
• protons
• electrons