CBSE Class 11-science Answered
Due to formation of an oxide film on the surface of metal they are unable to react further. Hence powdered metal is used to react with air.
Group 2 Elements - Part 1This video gives a general introduction to Group 2 elements, explains the e...
Group 2 Elements - Part 2This video explains ionisation enthalpy and physical properties of Group 2 ...
Group 2 Elements - Exam DecodedThis video contains practice questions on Group 2 elements of the s-block.