Flame Tests

What is the role of the metal chloride formed in a flame test?

• It increases the flame size

• It helps in vaporizing more easily

• It acts as a coolant

• It solidifies the sample

How can flame tests be used to identify elements?

• By observing the color of the flame produced when the element is heated.

• By analyzing the sound produced when the element is heated.

• By measuring the temperature of the flame produced.

• By observing the texture of the flame produced when the element is heated.

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NGSS.MS-PS1-4

What is the principle behind flame tests?

• Different elements emit different colors of light when heated in a flame.

• Flame tests are used to measure the amount of oxygen in a flame.

• Flame tests are used to create fire.

• Flame tests are used to determine the temperature of a flame.

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What factors affect the color of the flame in flame tests?

• Type of fuel used

• Time of day when the test is conducted

• Temperature of the flame

• Presence of specific elements or compounds

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NGSS.HS-PS4-3

Flame tests can be used to identify an element. Each element emits characteristic waves of light when it is heated in a flame. What describes how the light is produced?

• Protons in the ground state lose energy and give off light.

• Protons in the ground state gain energy and are emitted from the nucleus, giving off light.

• Electrons in the ground state lose energy and move to an excited state, giving off light.

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

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NGSS.HS-PS4-3

What is a flame test?

• A test to identify metal ions (cations)

• An instrumental analysis tool for identifying metal ions

• A process to separate the constituents of a mixture

• The process of establishing what anions are present in a substance

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NGSS.HS-PS1-1

What is the colour of the flame produced from a lithium containing compound?

• Crimson

• Green

• Yellow

• Lilac

What is the colour of the flame produced from a sodium containing compound?

• Crimson

• Green

• Yellow

• Lilac

What is the colour of the flame produced from a potassium containing compound?

• Crimson

• Green

• Yellow

• Lilac

Which process does the following describe? 'Sample placed in a flame, light emitted is passed through a spectroscope to give a spectrum which can be compared to a reference'

• Flame emission spectroscopy

• Chromatography

• Microscopy

• Light spectroscopy

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NGSS.HS-PS4-1

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