G8 PhySci 3.1.1 What is Matter?

Which two statements are true for both compounds and mixtures?

• They are made up of more than one type of atom.

• They can be separated into two or more elements.

• Their particles are held together by chemical bonds.

• Their particles all have the same chemical formula.

Which two statements describe a mixture?

• It includes atoms of different elements.

• It is a pure substance.

• Its parts can be separated using physical means.

• It can result from chemical bonding.

Which two statements are true?

• All particles of a compound have the same chemical formula.

• Different kinds of matter in a compound can be separated by physical means.

• Each particle of a compound consists of a single type of atom.

• The atoms in a particle of a compound are held together by chemical bonds.

In models of matter, gray spheres are carbon atoms, white spheres are hydrogen atoms, red spheres are oxygen atoms, and blue spheres are nitrogen atoms. Which model shows a mixture of elements and compounds?

• A.

• B.

• C.

• D.

In models of molecules, gray spheres are carbon atoms, white spheres are hydrogen atoms, red spheres are oxygen atoms, and blue spheres are nitrogen atoms. Which model represents a molecule of ammonia, NH₃?

• A.

• B.

• C.

• D.

In models of molecules, gray spheres are carbon atoms, white spheres are hydrogen atoms, and red spheres are oxygen atoms. Which model represents a molecule of hydrogen peroxide, H₂O₂?

• A.

• B.

• C.

• D.

7.  In models of molecules, gray spheres are carbon atoms, white spheres are hydrogen atoms, red spheres are oxygen atoms, and blue spheres are nitrogen atoms.  Which model represents a molecule of ammonia, NH₃?

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• 
• 
• 

8.  In models of molecules, gray spheres are carbon atoms, white spheres are hydrogen atoms, and red spheres are oxygen atoms.  Which model represents a molecule of hydrogen peroxide, H₂O₂?

• 
• 
• 
• 

9. In models of molecules, gray spheres are carbon atoms, white spheres are hydrogen atoms, red spheres are oxygen atoms, and blue spheres are nitrogen atoms. Which model represents a molecule of methane, CH₄?

• A.

• B.

• C.

• D.

The gold bar and the gold nuggets both contain pure gold. How many types of atoms do these two objects contain?

• 3

• 4

• 1

• 2