Conservation of Mass Quiz Review

What part of the atom forms chemical bonds?

• Protons

• Nuetrons

• Electrons

• Valence Electrons

• Cells

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

WHY do atoms form chemical bonds?

• To have a full valence shell

• To build molecules

• To complete chemical reactions

• To follow the Law of Conservation of Mass

If a physical change occurs...

• A new substance has been formed

• The substance is the same, but looks different

If a chemical change occurs...

• A new substance has been formed

• The substance is the same, but looks different

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

In order for a new substance to be formed...

• Chemical bonds between atoms must be changed

• A chemical equation must be written

• A liquid must turn into a gas

• A change in temperature must occur

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-1

NGSS.MS-PS1-2

When chemical bonds are formed...

• Some mass/matter is destroyed or created

• Valence electrons move from their original atoms

• The substance itself stays the same

• A chemical equation becomes unbalanced

Tags

NGSS.MS-PS1-5

Which of the following indicates a physical change has occurred? (Select all correct answers)

• Bubbles are produced

• A change in state has occurred

• A solid has formed

• A new substance has been made

Tags

NGSS.MS-PS1-4

All matter ___________. (Select all correct answers)

• Is created in chemical reactions

• Wants to form chemical bonds with other matter

• Has mass

Tags

NGSS.MS-PS3-1

The picture shows two models of the same molecule. Which of the following would be the correct name for the individual molecule?

•  $NH_3$  

•  $3HN$  

•  $N_3H$  

•  $N3H$  

Tags

NGSS.MS-PS1-1

Before the equation is balanced, how many Nitrogen are on the products side?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-1

NGSS.MS-PS1-2