DLD Performance Final

performance final prep

fall 2022

BRADY

DLD Instructions

1. Go through each of the slides and take notes. 

2. Each video has been hand selected to support your ability to write your essay for your performance final. Take notes over them. Specifically take notes over: 

   1. How an electron moves in an atom to create light and how it’s drawn on paper. 

   2. How do we match colors to elements.

3. The grade you get on the Quizizz will result in your grade for the Performance Final Prep activity in Grade Book.

BRADY PERFORMANCE FINAL 2022

FOCUS:

How an electron moves in an atom to create light and how it’s drawn on paper. 

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BRADY PERFORMANCE FINAL 2022

electron movement crash course

click for video

Multiple Choice

A particle of light is called a...

• Photoelectron

• Photon

• Proton

• Electron

Multiple Choice

What is the reaction involved if the electron moves from position 1 to 2?

• Light will be emitted

• Light will be absorbed

• The electron will become less excited

• The electron will decrease a quantum

Multiple Choice

What causes an atom to ABSORB light?

• photons take in energy and jump to a higher energy level

• electrons take in energy and jump to a higher energy level

• electrons release energy when falling to a lower energy level

• photons release energy when falling to a lower energy level

Multiple Choice

Which electron is most likely ABSORBING violet light?

• A

• B

• C

• D

Multiple Choice

When an electron transitions from a higher energy level to a lower energy level, the electron is:

• absorbing energy

• emitting visible light

• losing mass

• releasing energy

Multiple Choice

Violet light has more energy than red light. Which explanation below best represents the production of the violet color as opposed to the red color?

• An electron jumping from 1st energy level to 4th energy level

• An electron jumping from 1st energy level to 2nd energy level

• An electron falling from 4th energy level to 1st energy level

• An electron falling from 4th energy level to 2nd energy level

Multiple Choice

Emission of light from an atom occurs when an electron

• drops from a higher to a lower energy level.

• jumps from a lower to a higher energy level.

• moves within its atomic orbital.

• falls into the nucleus.

FOCUS:

How do we match colors to elements.

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BRADY PERFORMANCE FINAL 2022

creating colored light

​click for video

Multiple Choice

The light produced by a flame test is characteristic of an element because:

• electrons in the ground state gain energy, move to an excited state and give off light when they return

• electrons in the ground state lose energy, move to an excited state and give off light when they return

• protons in the ground state gain energy, move to an excited state and give off light when they return

• protons in the ground state lose energy, move to an excited state and give off light when they return

Multiple Choice

Regardless of how hot the flame is, when a metal ion is placed in a flame, it always give off the same color light. Why?

• The number of protons is still the same, so the same number of electrons get excited and fall back to the ground state the same way and give off the same color every time.

• The number of electrons is still the same, so the same number of electrons get excited and fall back to the ground state the same way and give off the same color every time.

• The number of neutrons is still the same, so the same number of electrons get excited and fall back to the ground state the same way and give off the same color every time.

• The number of ions is still the same, so the same number of electrons get excited and fall back to the ground state the same way and give off the same color every time.

Multiple Choice

What color flame would you predict the compound CuNO₃ to produce?

• red/orange

• purple

• blue/green

• white

Multiple Choice

Which set of ions will produce a white flame?

• lithium and strontium

• barium and sodium

• nickel and barium

• copper and sodium

Multiple Choice

A fellow student of yours thought that flame color was based on the element written at the beginning of the compound. Which statement would give evidence to support their claim?

• The flames of LiCl and and NaCl are the same color

• The flames of LiCl and NaCl are different colors

• The flames of Na₂SO₄ and NaCl are different colors

• The flames of Na₂SO₄ and CuCl₂ are different colors

Multiple Choice

What color flame would you predict the compound NaCl to produce?

• orange

• purple

• blue/green

• white

Multiple Choice

What color flame would you predict the compound KNO₃ to produce?

• orange

• purple

• blue/green

• white

Multiple Choice

What element could be used to create a purple flame?

• BaCl₂

• KBr

• LiNO₃

• CuSO₄

Elements give off unique flashes of color when exposed to heat that can help chemists to identify them like a fingerprint is used to identify people. 

Watch the video to see how elements are selected for different fireworks. Only watch this video

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BRADY PERFORMANCE FINAL 2022

flame lab