Unit 1 Investigating Chemicals Vocabulary

The basic unit of a chemical element. 

• Atoms
• Element 
• Compounds
• Pure Substance 

Tags

NGSS.MS-PS1-1

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

Determines an elements place on the periodic table based on the number of protons and electrons in a particular atom. 

• Atomic Number 
• Atomic Mass
• Chemical Symbol 
• Periods 

The number of protons and neutrons in the atom; the average mass of atoms of an element.  

• Chemical Symbol 
• Atomic Number
• Atoms 
• Atomic Mass

A column, or vertical line, left to right of elements numbered 1 to 18. 

• Groups 
• Periods 
• Element 
• Atom 

A horizontal row of elements numbered 1 through 7.    

• Groups 
• Element 
• Periods 
• Chemical Symbols 

A substance in which there is only one type of particle that has a specific composition and specific properties.  

• Atoms
• Elements 
• Compounds 
• Pure Substance 

Tags

NGSS.MS-PS1-4

A pure substance which cannot be broken down or changed into another substance using chemical means.   

• Compounds 
• Elements 
• Mineral 
• Physical Change 

Tags

NGSS.MS-PS1-4

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

• Chemical Change 
• Physical Change 

Tags

NGSS.MS-PS1-4

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

• Compounds 
• Element 
• Atoms 
• Subscript 

Tags

NGSS.MS-PS1-1