1.

Write a note on occurrence of group 1 and group 2 elements:

Answer»

i. Group 1 (alkali metals):

  • Two elements of group 1 i.e., sodium and potassium are the sixth and seventh most abundant elements present in the earth’s crust.
  • However, francium does not occur appreciably in nature because it is radioactive and has short half-life period.

ii. Group 2 (alkaline earth metals):

  • The elements magnesium and calcium are found abundantly in earth’s crust. 
  • Radium is radioactive and is not easy to find.


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