CHAPTER 5 ELECTRONS IN ATOMS

Bohr's contribution to the development of atomic structure

• was referred to as the "plum pudding model".

• was the discovery that electrons surround a dense nucleus.

• was proposed that electrons travel in circular orbits around the nucleus.

• is the quantum mechanical model

What is the total number of orbitals in the third principal energy level?

• 1

• 4

• 9

• 16

What is the maximum number of electrons allowed in the third energy level?

• 2

• 8

• 18

• 32

What is the maximum number of electrons that can occupy one orbital?

• 1

• 2

• 8

• 18

The electron configuration for fluorine is

• 1s²2s²2p³

• 1s²2s²2p⁵

• 1s²2s²2p⁶

• 1s²2s²2p⁶3s²

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The first three electrons that enter into p orbitals must have

• parallel spins.

• opposite spins.

• low energy levels

• opposite charges.

The atom whose electron configuration is 1s²2s²2p⁶3s²3p¹ is

• Ba

• Na

• Al

• Ga

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The configuration for the outermost energy level in Ca is

• 3s²

• 4s²

• 2s¹

• 4s¹

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The element having the same s and p configurations for principal energy level 3 as the element F has for its principal energy level 2 is

• Na

• Al

• P

• Cl

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The frequency and wavelength of all waves are

• directly related

• inversely related

• unrelated

• equal

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