Chemistry Unit Exam Review

Which of the following is an example of an element?

• Water
• Carbon 
• Oil
• Carbon Dioxide 

Tags

NGSS.HS-PS1-1

Which of the following is an example of a mechanical mixture (heterogenous)?

• Water

• cereal and milk

• brass

• salt water

An electron is:

• Neutral 
• Positively Charged 
• Electrostatic 
• Negatively Charged 

What is the chemical name of NO₂?

• Nitrogen dioxide 
• Dinitrogen dioxide
• Dinitrogen oxide 
• Dioxide nitrogen

Breaking a toothpick is an example of which type of change?

• Chemical Change

• Mechanical Change

• Physical Change

An explosion is an example of a: 

• Chemical Change 
• Physical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following describes a chemical change?

• Bonds are broken and rearranged in order to form a new substance

• No reaction occurs

• A state change occurs

When heat is given off during a reaction, this is an example of:

• Endothermic Reaction 
• Sublimation 
• Exothermic Reaction 
• Evaporation 

Particles in an atom that are neutral and have no charge are 

• negatrons 
• electrons 
• neutrons 
• protons 

Tags

NGSS.HS-PS1-8

The smallest particle of any particular type of matter is known by which of the following terms?

• Compound
• Atom
• Chemical
• Element

Tags

NGSS.MS-PS1-1