A balanced equation has...

• different numbers of each type of atoms before and after the reaction

• same numbers of each type of atoms before and after the reaction

• only aqueous substances

• matter that is NOT conserved

Tags

NGSS.HS-PS1-7

The phenomenon that matter cannot be created or destroyed explains

• conservation of energy

• conservation of recycling

• conservation of matter

• deactivation of matter

Tags

NGSS.HS-PS1-7

Select the group with a +1 charge.

Tags

NGSS.HS-PS1-1

Select the group with a -3 charge.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Select the group with a -1 charge.

Tags

NGSS.HS-PS1-1

What would the final answer for this crossover (criss-cross) method to determine the formula?

• CaN

• Ca₃N₂

• Ca₂N₃

• CaN₂

What is the product for the reaction:

Al + O₂ --> ____

• AlO

• Al₂O

• Al₃O₂

• Al₂O₃

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How is the law of conservation of matter explained?

Because atoms can only ​ (a)   , the initial and final masses

of the substances are ​ (b)  

• rearrange
• the same
• specific
• different

Tags

NGSS.HS-PS1-7

What type of bond would Li and F form?

• ionic

• metallic

• covalent

• polar covalent

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What type of bond would N and O form?

• ionic

• metallic

• covalent

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2