9th Class Chemistry, Chapter 1 - Elements

9^th Chemistry

Chapter 1:-

Fundamentals Of Chemistry

1.1            Topic 3:-

Elements

Short Q’s.

1. Human body is made up of how many elements? Write their names.

(Grw_ 19-GII)

Ans:- Six elements constitute about 99% of our body mass; namely: Oxygen 65 %, Carbon 18%, Hydrogen 10 %, Nitrogen 3%, Calcium 1.5% and Phosphorus 1.5%.

 

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Written By:- M.Ashir Azeem

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