Chemical Equations and Reactions

A chemical Equation is

• The actual physical process of new substances forming
• The written story using symbols describing a reaction
• Neither of the above
• The Yield sign

A subscript in a compound affects

• The entire compoun
• The element before it
• The element after it
• The yield sign

What does not occur during a chemical reaction

• Energy is used or released
• Bonds are broken and new ones form
• A new element is formed
• Matter is neither created or destroyed

When two substances combine chemically, the properties of the products are 

• Different from the properties of the reactants
• The same as the properties of the reactants
• Completely unpredictable

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What type of reaction is
XY ---->X + Y

• Synthesis
• Single replacement
• Decomposition
• No reaction

What type of reaction is 
X  +  Y ---->XY

• Synthesis
• Decomposition
• Single Replacement
• Double Replacement

What type of reaction is 
XY  + C ---->XC + Y

• Synthesis
• Decomposition
• Single Replacement
• Double Replacemnt

Tags

NGSS.MS-PS1-2

What type of reaction is 
XY  + DC ---->XC +DY

• Composition
• Decomposition
• Single Replacement
• Double Replacement

What type of reaction is 
XY  + DC ---->XC +DY

• Composition
• Decomposition
• Single Replacement
• Double Replacement

What type of reaction is 
XY  + DC ---->AB +CD

• Chemical change 
• Physical Change 
•  No reaction
• big reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5