Bohr Models & Light

Bohr's model of the atom proposed that ___.

• electrons move around the nucleus in fixed orbits
• neutrons move around the nucleus
• neutrons do not exist, but are just paired protons and electrons
• the nucleus spins

Valence electrons are located...

• inside the nucleus

• in outer space

• on the outermost electron shell in an atom

• on the electron shell closest to the nucleus.

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How many valence electrons does carbon have?

• 4

• 5

• 6

• 7

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How many core electrons are in the Bohr Model of sodium ?

• 11

• 12

• 10

• 2

Every element has its own unique atomic emission spectra.

• True

• False

The ground state is the highest energy state for an electron.

• True

• False

For an electron to change from ground state to an excited stated it must...

• Absorb energy
• Release energy

The emission spectrum shown below happens when...

• Electrons transition from lower to higher energy level.

• Electrons transition from higher to lower energy level.

• Electrons exist in fixed energy states

• Electrons are ejected from atoms.

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Emission of light from an atom occurs when an electron

• "falls" 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.

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Why are line emission spectra of elements called "atomic fingerprints"?

• They are all the same
• They are all unique
• They are all similar
• They all contain colored light

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