MRC Chemistry Basics

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

• Compound
• Atom
• Chemical
• Element

all matter is made of what 

• energy 
• atoms 
• electrons 
• compounds 

What is the atomic number?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

Basic unit of matter - the smallest piece of matter known

• Element 
• Atom
• Molecule
• Compound

Burning a piece of paper 

• Chemical Change 
• Physical Change 

Mixing salt and water 

• Chemical Change 
• Physical Change 

Melting Ice 

• Chemical Change 
• Physical Change 

Milk turning sour

• Chemical Change
• Physical Change 

What are Products in a Chemical reaction?

• They are the molecules that result from a chemical reaction

• They are the molecules that are the starting materials of a chemical reaction

Consider the chemical equation CH₄ + 2 O₂ → CO₂ + 2 H₂O. In this equation, CH₄ is a

• product
• reactant
• displacement