Periodicity

Lecture 1 :
At the end of the lesson the students should be able to :
(a)      Indicate period, group and block (s, p, d, f).
(b)      Specify the position of metals, metalloids and non-metals in the periodic table.
(c)     Deduce the position of elements in the periodic table from its electronic configuration

Lecture 2:
At the end of the lesson the students should be able to :
(a)       Explain the variation in atomic and ionic radii
i.      across periods 2 and 3
ii.      across the first row of transition elements.
iii.      down a group.
(b)   Explain the variation in the radius of isoelectronic

Lecture 3:
At the end of the lesson the students should be able to :
  • Define the first and second ionisation energies. 
  • Explain the increase in the successive ionisation energies of an element.
  • Explain the variations in the first ionisation energy
        i.    across periods 2 and 3.
        ii.    down groups 1 and 2.

Lecture 4:
At the end of the lesson the students should be able to :

    (a) Deduce the electronic     configuration     of an element     and its      position     in the     periodic table based on     successive ionisation energy data.

Lecture 5:
At the end of the lesson the students should be able to :
  • Define electron affinity and electronegativity.
  • Explain the variation in electronegativity of elements
        i.      across periods 2 and 3      
        ii.      down a group.