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Atomic Theory and Structure Quiz

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Questions and Answers

Which of the following statements about atomic theory is true?

Atoms can be created and destroyed in chemical reactions.

Chemical compounds are formed by atoms in fractional ratios.

Chemical elements consist of very small particles called atoms. (correct)

All atoms of a specific element are different.

All atoms of a specific element are identical.

True

The ______ discovered the nucleus of the atom.

Rutherford

What is the charge of a neutron?

Neutral Signup and view all the answers

What are valence electrons?

Outermost electrons involved in reactions. Signup and view all the answers

What is the effect of increasing nuclear charge on atomic radius?

The atomic radius decreases. Signup and view all the answers

Which group contains the alkaline earth metals?

Group 2 Signup and view all the answers

Match the following scientists with their discoveries:

Democritus = Atoms deplicted as random shapes John Dalton = Indestructible solid spheres J.J. Thomson = Electrons and cathode rays Rutherford = The nucleus Signup and view all the answers

What is ionization energy?

Energy to remove an electron. Signup and view all the answers

Isotopes contain equal numbers of protons but different numbers of electrons.

False Signup and view all the answers