Unit 1: Chemicals Review

The basic unit of a chemical element. 

• Atoms
• Element 
• Compounds
• Pure Substance 

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Represents the name of an element and is written as a capital or a capital letter followed by a lowercase letter.

• Atomic Number 
• Atomic Mass
• Chemical Symbol 
• Groups

A pure substance made by chemically combining two or more elements.  

• Compounds 
• Element 
• Atoms 
• Subscript 

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A change in matter that involves a substance going from one state to another without alteration of the chemical composition.   

• Chemical Change 
• Physical Change 

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The number written to the right and slightly below an element in a chemical formula; represents the number of atoms of the element directly in front of it.

• Coefficient 
• Atom 
• Subscript 
• Atomic Mass 

Tags

NGSS.MS-PS1-1

A representation of a compound in which elements are represented by their symbols and subscripts represent the number of atoms of each element.

• Subscript 
• Chemical Formula 
• Chemical Reaction 
• Groups 

The process by which one or more substances changes to produce one or more different substances; goes through a chemical change.

• Chemical Change 
• Physical Change 
• Chemical Reaction 
• Chemical Formula 

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NGSS.MS-PS1-2

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How many elements are in C₆H₁₂O₆?

• 1
• 2
• 3
• 4

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NGSS.MS-PS1-1

what is the definition of physical change?

• any change that results in the formation of new chemical substances. 
• rusting
• changes affecting the form of a chemical substance, but not its chemical composition.
• any property that is measurable, whose value describes a state of a physical system

what is the definition of chemical change?

• any change that results in the formation of new chemical substances. 
• changing clothes
• matter cannot be created or destroyed, only change form
• changes affecting the form of a chemical substance, but not its chemical composition.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5