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CSEE (Form 4) Periodic Classification of Elements — practice questions

Explore 28 free Periodic Classification of Elements questions in CSEE (Form 4) Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Periodic Classification of Elements questions and exercises with answers

Showing questions 1–28 of 28.

In which type of bonding are pairs of electrons shared between atoms?Read the answer and worked solution →What happens to electrons when an ionic bond is formed?Read the answer and worked solution →What actually holds a piece of metal together in metallic bonding?Read the answer and worked solution →A solid salt crystal will not conduct electricity, but the same salt dissolved in water will. What explains this?Read the answer and worked solution →Match each scientist to their contributionRead the answer and worked solution →Ionic or covalent?Read the answer and worked solution →Complete the driver of bond formationRead the answer and worked solution →Single, double and triple bondsRead the answer and worked solution →True or false: Lewis structuresRead the answer and worked solution →Complete the definition of resonanceRead the answer and worked solution →Tap every bond parameter the chapter namesRead the answer and worked solution →True or false: ionic solidsRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →Bonded pair or lone pair?Read the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Order the reasoning: why resonance is neededRead the answer and worked solution →Reading the definitions backRead the answer and worked solution →True or false: what bond parameters affectRead the answer and worked solution →Bond parameters in useRead the answer and worked solution →Which parameter answers this?Read the answer and worked solution →True or false: resonanceRead the answer and worked solution →Order the steps: draw a Lewis structureRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Assertion and reason: structureRead the answer and worked solution →Flip and pair: parameter with what it measuresRead the answer and worked solution →

Worked practice questions

In which type of bonding are pairs of electrons shared between atoms?

  1. Covalent bonding
  2. Ionic bonding
  3. Metallic bonding
  4. Hydrogen bonding
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Correct answer: A. Covalent bonding

1. When atoms bond, electrons are either shared or exchanged. 2. Covalent bonding is the form where pairs of electrons are shared between atoms. 3. Ionic bonding is the other route, where electrons are transferred rather than shared. _Source: Siyavula Physical Sciences Grade 10 (Everything Science, CC BY 4.0), Chapter 6: Chemical bonding_

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What happens to electrons when an ionic bond is formed?

  1. They are shared evenly between atoms
  2. They leave the sample completely
  3. They stay fixed on their own atom
  4. They move from one atom to another
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Correct answer: D. They move from one atom to another

1. Ionic bonding happens when the two atoms differ strongly in electronegativity. 2. One or more electrons are transferred from one atom to another. 3. The atom that loses electrons becomes a positive cation and the atom that gains them becomes a negative anion. 4. The two opposite ions are then held together by electrostatic attraction. 5. Sharing electrons evenly is covalent bonding, which is the other pattern entirely. _Source: Siyavula Physical Sciences Grade 10 (Everything Science, CC BY 4.0), Chapter 6: Chemical bonding_

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What actually holds a piece of metal together in metallic bonding?

  1. Nuclei attract each other directly
  2. Shared pairs sit between nuclei
  3. Opposite ions attract each other
  4. Nuclei attract delocalised electrons
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Correct answer: D. Nuclei attract delocalised electrons

1. In a metal the valence electrons are delocalised, so they do not stay near one nucleus. 2. The positive atomic nuclei sit in a sea of these delocalised electrons. 3. Metallic bonding is the electrostatic attraction between those positive nuclei and the delocalised electrons. 4. Because the electrons are free to move, metals conduct electricity well. 5. Because the nuclei are packed closely, metals also conduct heat well. 6. Shared pairs sitting between two nuclei describes a covalent bond, not a metallic one. 7. Opposite ions attracting each other describes an ionic bond instead. _Source: Siyavula Physical Sciences Grade 10 (Everything Science, CC BY 4.0), Chapter 6: Chemical bonding_

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