Question

What is oxygen ?
&
What is Co2 ?
​

Answer 1

Answer:

these both are gases and are very useful.

Answer 2

Answer:

Oxygen (O) is the 8th element on the periodic table and is a non metalic substance. majorly present as a gas in the atmosphere. It's required for breathing and also cause to ignite fire

$CO_2$ is the combination of carbon and oxygen it's also a not metallic gas. It's used as fire extinguisher