Chemical Reactions and Valence in Biotechnology Quiz
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Questions and Answers

What is the valence of an element?

  • The number of electrons an atom must gain, lose, or share to have a full outer shell (correct)
  • The number of neutrons in the nucleus of an atom
  • The number of energy levels in an atom
  • The number of protons in the nucleus of an atom

What is the meaning of 'oxidation number'?

  • The number of electrons in the outermost energy level of an atom
  • The number of neutrons in the nucleus of an atom
  • The number of protons in the nucleus of an atom
  • The number of electrons that an atom gains or loses in a chemical reaction (correct)

What does the term 'octet' refer to in chemistry?

  • A group of eight protons in the nucleus of an atom
  • A group of eight electrons in the outer shell of an atom (correct)
  • A group of eight energy levels in an atom
  • A group of eight neutrons in the nucleus of an atom

What is the valence of an element?

<p>The number of electrons an atom must gain, lose, or share to have a full or stable outer electron shell (B)</p> Signup and view all the answers

What does the octet rule state?

<p>Outer electron shells prefer to have eight electrons, even if the shell may not be full (D)</p> Signup and view all the answers

How do you calculate the oxidation state of an element in a molecule?

<p>Determine the oxidation state of all elements forming the molecule except the element of interest, and ensure the sum of all oxidation states equals zero or the net charge on the molecule (B)</p> Signup and view all the answers

What is the meaning of 'oxidation number'?

<p>The number of electrons that an atom gains, loses, or shares to attain a stable outer electron shell (B)</p> Signup and view all the answers

What does the term 'octet' refer to in chemistry?

<p>A group of eight electrons in the outer shell of an atom (A)</p> Signup and view all the answers

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