Question

Explain why hydrogen and oxygen are considered elements whereas water is not considered an element.

Answer 1

hydrogen and oxygen are made of only one homonuclear atom whereas H2O is made of two hetero nuclear atoms that is hydrogen and oxygen therefore H2O is a compound and hydrogen, oxygen is element

Answer 2

Answer:

Hydrogen and oxygen are considered as elements which cannot split into different substances by applying any kind of energy like heat or electricity whereas water is a composed of constituents like hydrogen and oxygen in a fixed proportion and it can be split up by applying energy. So, it is not an element.