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The table below gives information on four elements represented by letters K, L, M and N. Study it and answer the questions that follow. The letters do not represent the actual symbols of the elements.

      

The table below gives information on four elements represented by letters K, L, M and N. Study it and answer the questions that follow. The letters do not represent the actual symbols of the elements.
tableelement472017324.jpg
a) Which two elements have two similar properties? Explain.
b) What is the most likely formula of oxide of L?
c) Which element is a non-metal? Explain
d) Which one of the elements is the strongest reducing agent? Explain.
e) Explain why ionic radius of N is less than that of M.
f) Explain why the ionic radius of L is bigger than its atomic radius.

  

Answers


John
a) K and N because they are in the same group of the periodic table

b) L2O7
OR
L2O

c) L: Because it has 7 electrons in its outmost energy level and so belongs to group (VII)

d) M: because its atomic radius is large so its tendency to donate its electrons is high

e) M and N are in the same period. Across the period, ionic radius decreases due to increase in nuclear
charge, which results in strong attraction of electrons

f) L gains electrons to form L-. Due to increased number of electrons, there’s increased
electron repulsion.
johnmulu answered the question on April 7, 2017 at 12:20


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