CIA Demonstration: Flame Colors (2.2.3)

Question 1

What is an Exothermic Reaction?

Answer 1

A reaction that gives off energy.

Question 2

What is Gunpowder?

Answer 2

Potassium nitrate, sulfur, and carbon.

Question 3

Ion

Answer 3

An atom or group of atoms with a net positive or negative charge.

Question 4

Quantized

Answer 4

Existing only at discrete (non-continuous) values.

Question 5

• Fireworks work by a three-step process in which 1) an exothermic reaction causes 2) electrons in metal ions to be excited, and 3) light is emitted when these electrons relax back to the ground state.

Answer 5

• Fireworks work by a three-step process in which 1) an exothermic reaction causes 2) electrons in metal ions to be excited, and 3) light is emitted when these electrons relax back to the ground state.

Question 6

Fireworks work by a three-step process.

First, an exothermic reaction (for example, the
combustion of gunpowder) is used to provide
energy.

Second, the energy released in the exothermic
reaction excites electrons in metal ions.

Third, light is emitted when these electrons relax
back to the ground state. Since the energy of
electrons is quantized, each metal emits
characteristic colors of light.

Answer 6

Fireworks work by a three-step process.

First, an exothermic reaction (for example, the
combustion of gunpowder) is used to provide
energy.

Second, the energy released in the exothermic
reaction excites electrons in metal ions.

Third, light is emitted when these electrons relax
back to the ground state. Since the energy of
electrons is quantized, each metal emits
characteristic colors of light.

Question 7

When a balloon containing hydrogen gas and
potassium carbonate is ignited, violet light is
emitted. Potassium emits violet light when its
electrons return from an excited state to the ground
state.

Answer 7

When a balloon containing hydrogen gas and
potassium carbonate is ignited, violet light is
emitted. Potassium emits violet light when its
electrons return from an excited state to the ground
state.

Question 8

When a balloon containing hydrogen gas and
copper chloride is ignited, green light is emitted.
Copper emits green light when its electrons return
from an excited state to the ground state.

Answer 8

When a balloon containing hydrogen gas and
copper chloride is ignited, green light is emitted.
Copper emits green light when its electrons return
from an excited state to the ground state.