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Atomic Theory Changes and Engineering Applications

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Atomic Theory Changes and Engineering Applications

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Questions and Answers

What did Antoine Becquerel discover by accident?

The charge of an electron

The mass of an electron

The effect of a bar magnet on the cathode ray

The darkening of photographic plates by uranium compounds (correct)

What are subatomic particles that atoms are made up of?

Protons, neutrons, and photons

Protons, neutrons, and electrons (correct)

Electrons, positrons, and neutrinos

Neutrons, electrons, and positrons

Who determined the ratio of electric charge to the mass of an individual electron using a cathode ray tube?

Antoine Becquerel

J. J. Thomson (correct)

R. A. Millikan

Wilhelm Röntgen

Who is credited with the discovery of X-rays?

Wilhelm Röntgen Signup and view all the answers

According to the Law of Conservation of Mass, what can matter not do?

Matter cannot be created or destroyed Signup and view all the answers

According to Dalton's Atomic Theory, which of the following statements is NOT true?

A chemical reaction results in the creation or destruction of atoms Signup and view all the answers

Which law is supported by Dalton's Atomic Theory and states that different samples of the same compound always contain its constituent elements in the same proportion by mass?

The Law of Definite Proportion Signup and view all the answers

What does Dalton's Atomic Theory state about the size, mass, and chemical properties of atoms of a given element?

They are identical in size, mass, and chemical properties Signup and view all the answers

In Dalton's Atomic Theory, what is the relationship between the atoms of one element and the atoms of all other elements?

They are different from the atoms of all other elements Signup and view all the answers

Which principle states that if two elements can combine to form more than one compound, the masses of one element that combine with a fixed mass of the other element are in ratios of small whole numbers?

The Law of Multiple Proportions Signup and view all the answers