Arrangement of Electrons in Atoms

According to the Bohr model of the atom, which particles are allowed to exist in any one of a number of energy levels?

• a.  electrons

• b.  protons

• c.  neutrons

• d.  Both (b) and (c)

The line-emission spectrum of an atom is caused by the energies released when electrons

• “jump” from a lower energy level to a higher energy level.

• “jump” from a higher energy level to a lower energy level.

• “jump” from the ground state to an excited state.

• “jump” from the exited state to ground state.

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A form of energy that exhibits wave behavior as it travels through space is

• microwave radiation

• ultraviolet radiation

• infrared radiation.

• All options

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In the equation c = λv, c represents

• the wavelength.

• the frequency.

• the speed of light.

• Planck’s constant.

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The process of an atom releasing energy when it moves to a lower energy state is called

• absorption.

• emission.

• translation.

• regression.

In the Bohr model of the atom, in which orbit is an electron in its lowest energy state?

• in the orbit closest to the nucleus

• in the orbit farthest from the nucleus

• in the electron cloud

• midway between two orbits

How many electrons are present in an atom of calcium that has the electron configuration 1s²2s²2p⁶3s²3p⁶4s²?

• 6

• 16

• 20

• 36

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Which of the following is a noble gas?

• carbon

• oxygen

• sodium

• neon

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The Bohr model is also called the _______ model.

• cookie

• planetary

• plum pudding

• quantum

According to the Bohr model, the electron can circle the nucleus only in allowed paths, or _________.

• circles

• pathways

• rings

• orbits