Periodicity Module Exam Practice Quiz

What is atomic theory?

• The scientific theory that all matter is composed of small, indivisible particles called electrons

• The scientific theory that all matter is composed of small, indivisible particles called neutrons

• The scientific theory that all matter is composed of small, indivisible particles called atoms

• The scientific theory that all matter is composed of small, indivisible particles called protons

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Which scientist is known for discovering the nucleus of the atom?

• Niels Bohr

• Ernest Rutherford

• J.J. Thomson

• Dmitri Mendeleev

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What distinguishes isotopes of the same element from one another?

• The number of protons

• The number of neutrons

• The number of electrons

• The atomic number

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What is a group of 6.02 x 10^23 atoms or particles?

• An ion

• A mole

• An isotope

• An atomic mass

What is the number of protons, neutrons, and electrons in this neutral atom?

• P = 8

  N = 8

  E = 8

• P = 17

  N = 17

  E = 17

• P = 9

  N = 8

  E = 9

• P = 8

  N = 9

  E = 8

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A sample of element X contains 90.0% X-35 atoms, 5.00% X-37 atoms, and 5.00% X-38 atoms. What is the weighted average mass of this element?

Which of the following is an example of electromagnetic radiation?

• X-rays

• Visible light

• Radio waves

• UV light

• All of these

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Which type of electromagnetic radiation has the shortest wavelength?

• Radio waves

• X-rays

• Visible light

• Microwaves

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If a wave of electromagnetic radiation has a higher frequency than microwaves, which of the following statements is true?

• It has a lower frequency than radio waves

• It carries more energy than microwaves

• It carries less energy than microwaves

• It has a larger wavelength than radio waves

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What do the bright lines that are produced by a substance when it is excited with energy represent?

• Emission spectrum

• Prism

• Visible spectrum

• Light

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