Question

in hydrogen, hydrogen peroxide, carbondioxide, water vapour, hydrogen is a odd man out why and e

Answer 1

because hydrogen is an element

Answer 2

Hydrogen here is an element while others are compound. Hydrogen peroxide has a formula of H2 O2 which represent two molecules of hydrogen and oxygen respectively. Carbon dioxide has the formula of CO2 which represents a single molecule of carbon and two molecules of oxygen. water vapour is a compound of water vapours teams and are present in the environment which helps to cause clouds and many more criteria. Water vapour is an important part of the water cycle.