Chemistry: History of the Periodic Table

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Questions and Answers

Which group of elements is always found combined with nonmetals in nature?

  • Transition Metals
  • Halogens
  • Alkaline Earth Metals (correct)
  • Alkali Metals

What is the principal electron shell designated by the Principal Quantum Number (n)?

  • halogens
  • alkali metals
  • noble gases
  • ground state (correct)

Which element makes up over ¾ of the atmosphere?

  • oxygen
  • hydrogen
  • carbon
  • nitrogen (correct)

Who proposed that an electron can also be thought of as a wave?

<p>Louis de Broglie (C)</p> Signup and view all the answers

What type of gases are the elements in Group 18 (Noble Gases)?

<p>unreactive gases (D)</p> Signup and view all the answers

Which scientist is recognized as the 'father' of the Periodic Table?

<p>Dmitiri Ivonovich Mendeleev (B)</p> Signup and view all the answers

According to the text, which group of elements does Dmitiri Ivonovich Mendeleev belong to?

<p>Representative/Main Group elements (C)</p> Signup and view all the answers

True or False: Non-metals are considered as one of the good conductors of heat and electricity.

<p>False (B)</p> Signup and view all the answers

Which group of elements includes the Transition Elements according to the text?

<p>Groups 3 to 12 (B)</p> Signup and view all the answers

True or False: Metalloids have properties of both metals and non-metals.

<p>True (C)</p> Signup and view all the answers

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