Chemical Reactions

tells us the number of atoms of each element in a compound

• Coeffecient
• Exponent
• Chemical Formula
• Calculator

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NGSS.MS-PS1-1

A chemical change is different than a physical change because in a chemical change

• chemicals are used

• molecules do not physically touch

• a new substance is formed and in a physical no new substance is formed

• the change can be seen but in a physical change it cannot

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NGSS.MS-PS1-2

True or False
In a chemical reaction, no new atoms are created, and no atoms are destroyed. 

• true
• false

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NGSS.MS-PS1-5

The right side of the equation below is called the

• products
• reactants

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

The left side of the equation below is called

• Products
• Reactants

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NGSS.MS-PS1-1

NGSS.MS-PS1-2

a substance formed when two or more elements are chemically bonded together

• Element Soup
• Pure Element
• Ion
• Compound

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NGSS.MS-PS1-1

the symbolic representation of a chemical reaction

• Long Hand
• Short Hand
• Electron Configuration
• Chemical Equation

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NGSS.MS-PS1-5

The Law of Conservation of Mass states

• that matter exists in all states and reacts the same
• that matter can only be changed into new substances by introducing a catalyst
• that matter exists in the same state throughout any chemical change
• that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants

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NGSS.MS-PS1-5

How many Al atoms are in this compound?         4Al₂O₃

• 2
• 8
• 6
• 4

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NGSS.MS-PS1-1

How many F atoms are in this compound?
6MgF₂ 

• 2
• 6
• 8
• 12

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NGSS.MS-PS1-1