Warm Up (8-22-25)

What is the Atomic # for Oxygen?

• 8

• 16

• 12

• 6

What is the Mass for Fluorine?

• 16

• 19

• 9

• 10

What is the Mass for the element with Atomic # 20?

• 40

• 24

• 56

• 12

What is the number of electrons in As^-3 ?

• 75

• 33

• 36

• 72

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the number of Electrons in the Bismuth Ion (Bi⁺⁵)?

• 78

• 80

• 75

• 83

Tags

NGSS.HS-PS1-1

The laboratory's first experiment was to characterize the reactants and products of this firewood combustion reaction and to determine what type of reaction took place. Which of the following statements is correct?

• The heat and light products indicate that this combustion reaction is endothermic.

• The cellulose and oxygen products indicate that this combustion reaction is exothermic.

• The cellulose and oxygen products indicate that this combustion reaction is endothermic.

• The heat and light products indicate that this combustion reaction is exothermic.

Tags

NGSS.HS-PS1-4

Automotive technology students are studying the chemical reaction that occurs within a car's combustion chamber. Controlled explosions take place inside the chamber as gasoline reacts with oxygen. The car's engine transforms chemical potential energy into kinetic energy, or energy of motion.

• This is an exothermic reaction because energy is absorbed.

• This is an endothermic reaction because energy is absorbed.

• This is an endothermic reaction because energy is released.

• This is an exothermic reaction because energy is released.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-4