May 4

A decomposition reaction can be represented as _____________________.

• AB  → A + B
• A + B → AB
• AB + CD → AC + BD
• A + BC → B + AC

A chemical change in which a single compound breaks down into two or more simpler products is called a ______________________.

• single-replacement reaction
• synthesis reaction
• double-replacement reaction
• decomposition reaction

This chemical equation for mercury oxide is an example of what type of reaction?
2HgO  → 2Hg + O₂

• decomposition reaction
• synthesis reaction
• combustion reaction
• Marvin the Martian reaction

A chemical change in which two or more substances react to form a new substance is a ____________________________.

• decomposition reaction
• synthesis reaction
• double displacement reaction
• combustion reaction

A synthesis reaction can be represented as ________________________.

• AB + CD → AC + BD
• AB → A + B
• A + B → AB
• A + BC → B + AC

Which of the following is an example of synthesis?

• Na + Br₂ --> NaBr
• KClO₃ --> KCl + O₂
• HgO + Cl₂-->HgCl + O₂
• Cl₂ + NaBr --> NaCl + Br₂

What is decomposition?

• putting substances together
• breaking substances apart
• element replacing another element in a compoud
• burning of a subtance

Matter can not be created nor destroyed: it can only be

• Destroyed a little bit
• Invisible
• Transformed, changed
• None of the above

The number to the lower side of an element is a 

• Subscript
• Superscript
• Coefficient
• Charge

The number in front of a compound or element is a 

• Subscript
• Coefficient
• Superscript
• Charge