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Online form 2 chemistry video lessons and lectures in Kenya

9 video lessons

• Use the information in the table about group 1 elements to answer the questions that follow
  

  Use the information in the table about group 1 elements to answer the questions that follow When the group 1 elements react with water, hydrogen gas is given off. The...

  
  Form 2, Chemistry: The structure of the atom and the Periodic table

  Date posted: March 5, 2019.

• Complete the table below to show the number of the sub-atomic particles of the given nuclides. X and Y are not actual chemical symbols.
  

  Complete the table below to show the number of the sub-atomic particles of the given nuclides. X and Y are not actual chemical symbols.

  
  Form 2, Chemistry: The structure of the atom and the Periodic table

  Date posted: March 5, 2019.

• The table below shows the relative atomic masses and the percentage abundance of the isotopes L₁ and L₂ of element L.
  

  The table below shows the relative atomic masses and the percentage abundance of the isotopes L₁ and L₂ of element L. Calculate the relative atomic mass...

  
  Form 2, Chemistry: The structure of the atom and the Periodic table

  Date posted: March 4, 2019.

• Balance the chemical equation given below C₃H₈ + O₂ ?H₂O + CO₂
  

  Balance the chemical equation given below C₃H₈ + O₂ ?H₂O + CO₂

  
  Form 2, Chemistry: Chemical Equations

  Date posted: February 26, 2019.

• An atom of sodium is represented as shown below: (a) Calculate the number of neutrons in the nucleus of a sodium atom
  

  An atom of sodium is represented as: a) Calculate the number of neutrons in the nucleus of a sodium atom. b)Write the electronic configuration of a sodium atom

  
  Form 2, Chemistry: Structure of an Atom

  Date posted: February 26, 2019.

• Chlorine is element number 17 in the periodic table of elements. Write down the electron configuration of its: a) Atom b) Ion
  

  Chlorine is element number 17 in the periodic table of elements. Write down the electron configuration of its: a) Atom b) Ion

  
  Form 2, Chemistry: Structure of an Atom

  Date posted: February 26, 2019.

• Using dots (.) and crosses (x) to represent outermost electrons, draw diagrams to show bonding in. a)Carbon (IV) oxide b) NH₄⁺
  

  Using dots (.) and crosses (x) to represent outermost electrons, draw diagrams to show bonding in. a)Carbon (IV) oxide b) NH₄⁺

  
  Form 2, Chemistry: Structure and Bonding

  Date posted: February 26, 2019.

• An element N forms an ion N². This ion contains 18 electrons: a) State the period and the group of the periodic table that element N belongs.
  

  An element N forms an ion N². This ion contains 18 electrons: a) State the period and the group of the periodic table that element N belongs. b) Write the formula of the compound which would be formed if N reacts with bromine.

  
  Form 2, Chemistry: Structure and Bonding

  Date posted: February 26, 2019.

• An element Q consists of 3 isotopes of mass 28, 29, 30 and percentage abundance of 92.2%, 4.7%, 3.1% respectively. Determine the relative atomic mass of the element?
  

  An element Q consists of 3 isotopes of mass 28, 29, 30 and percentage abundance of 92.2%, 4.7%, 3.1% respectively. Determine the relative atomic mass of the element?

  
  Form 2, Chemistry: Chemical Families

  Date posted: February 26, 2019.