you will talk squeaky
It depends on what you mean. We can breathe helium without any ill effects as long as we get enough oxygen. However, nothing could breathe and use helium as we breathe and use oxygen because helium is inert. Unlike oxygen, which is highly reactive, helium does not participate in chemical reactions, so it could not serve an organism any purpose.
they can breathe it in
helium is less dense than the normal air we breathe, so when you breathe helium out and your vocal chords vibrate, it comes out in a higher pitch tone.
Air you breathe out is denser than helium. This is because exhaled air contains a higher concentration of carbon dioxide and water vapor, which are denser than the gases in the atmosphere. Helium is much lighter than air and tends to rise up.
Helium doesn't cause cancer, so from that perspective it doesn't matter.
No. It is an inert gas. But, if you only breathe helium, you may deprive your brain of oxygen, and that can be fatal.
Not exactly. Helium is an inert gas, and is not toxic.However, you could die from not having oxygen, so if you breathe only helium, yes you could die.
One of the effects of a small amount of helium in the breath is to change the voice similar to a cartoon Donald Duck sound. Professional deep sea divers will breath a mixture of Oxygen and Helium this helps preventdecompression sickness known as the Bends. If you breath pure helium you would asphyxiate. (starve the brain of Oxygen and die)
No however the lack of oxygen is deadly. It is unlikely that you will hurt yourself sucking the helium out of balloons, as long as you breathe oxygen in between breaths of helium. There is a small percentage of helium (.0005%) in the earths atmosphere.
No, helium is toxic to your lungs and can kill you if you breathe it long enough, or you could have severe lung damage done to you.
No. Jupiter's atmosphere is mostly hydrogen and helium with no free oxygen.
That would happen after it loses a certain amount of helium.