Q54 of 203 Page 130

Explain the significance of the symbol H.

Significance of symbol H

● The symbol H refers to the element hydrogen.

● The symbol H refers to one atom of hydrogen.

● The symbol H refers to one mole of hydrogen i.e., 6.022 × 10²³ atoms.

● The symbol H refers to 1 gram atomic mass of hydrogen.

Which postulate of Dalton’s atomic theory can explain the law of constant proportions?

What is the significance of the symbol of an element? Explain with the help of an example.

What is an atom? How do atoms usually exist?

What is a molecule? Explain with an example.