Introduction to Electrons

the central region of an atom where its neutrons and protons are is its 

• nucleus 
• electron cloud
• core 
• center 

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What subatomic particle(s) would be found orbiting the nucleus?

• Neutrons only
• Electrons only
• Protons and Neutrons
• Protons and Electrons

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What are the 3 subatomic particles that make-up the atom?

• protons, neutrons, and isotopes
• neutrons, isotopes, and electrons
• positives, negatives, and electrons
• protons, neutrons, and electrons

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Which is a particle of electromagnetic radiation with no mass that carries a quantum of energy?

• electron 
• neutron 
• microwave
• photon 

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Which model describes electrons as orbiting around a central nucleus?

• Bohr
• Rutherford
• Quantum Mechanical 
• Plum Pudding 

Distance between one point on a wave and the nearest point just like it.

• amplitude 
• wavelength
• frequency
• quantum

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Light is emitted when electrons

• move from one atom to another.

• collide with one another, releasing energy.

• move from a lower energy level to a higher energy level.

• move from a higher energy level to a lower energy level.

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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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High frequency waves have _________ wavelength.

• varying
• high
• the same
• low

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NGSS.HS-PS4-1

The number of waves that pass a fixed point in a given amount of time is...

• frequency

• wave speed

• amplitude

• wavelength

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