Frank ICSE Solutions for Class 9 Chemistry - Study of the First Element - Hydrogen PAGE NO :146 Solution 1:(a) Symbol of hydrogen is 'H' and its molecular formula is H2. (b) 2 H means 2 atoms of hydrogen while H2 means one molecule of hydrogen. (c) Lavoisier gave "Hydrogen" its name because it means water product.Solution 2: Hydrogen is found in free state as … [Read more...] about Frank ICSE Solutions for Class 9 Chemistry – Study of the First Element – Hydrogen