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Hydrogen in sentence

275 examples of Hydrogen in a sentence

After about a few minutes, there was hydrogen and helium in the universe.
The universe was about 75 percent hydrogen, 25 percent helium.
After about 400 million years, the first stars formed, and that hydrogen, that helium, then began to cook into the heavier elements.
And on some of those planets, the oxygen, which had been created in that first generation of stars, could fuse with hydrogen to form water, liquid water on the surface.
And they also used hydrogen from water.
Because there's no oxygen there, it's the largest reservoir of hydrogen sulfide on Earth.
And that is that every minute, 400 pounds of hydrogen and almost seven pounds of helium escape from Earth into space.
So hydrogen, helium and many other things make up what's known as the Earth's atmosphere.
So I've told you that it happens at the rate of 400 pounds a minute for hydrogen and almost seven pounds for helium.
So these two images of the Earth show you what that glow of escaping hydrogen looks like, shown in red.
That's because we think Mars used to have a wetter past, and when water had enough energy, it broke up into hydrogen and oxygen, and hydrogen being so light, it escaped into space, and the oxygen that was left oxidized or rusted the ground, making that familiar rusty red color that we see.
Here, for example, you can see in the red circle is the size of Mars, and in blue you can see the hydrogen escaping away from the planet.
And this helps us confirm ideas, like why Mars is red, from that lost hydrogen.
But hydrogen isn't the only gas that's lost.
And you can see that because oxygen is heavier, it can't get as far as the hydrogen, but it's still escaping away from the planet.
And we think this is because you have an extended atmosphere of hydrogen all around the planet that's making it look puffier and thus blocking more of the light that you see.
So unlike our 400 pounds per minute of hydrogen being lost on Earth, for these planets, you're losing 1.3 billion pounds of hydrogen every minute.
Our hydrogen, from water that is broken down, is going to escape into space more rapidly, and we're going to be left with this dry, reddish planet.
When sunlight comes in and strikes a photocatalyst, like TiO2, or titanium dioxide, it creates these really reactive oxygen species, like superoxides, hydrogen peroxide and hydroxyl radicals.
Chemical fuel cells take hydrogen and oxygen, and they can combine them together and you get electricity.
It's the same principle: it's got oxygen on one side, but instead of having hydrogen on the other, it's got some soup, and inside that soup there are living microbes.
I can see these bubbles with these hydrogen packages, floating around on the ground, driven by AI.
These rays were made of negatively charged particles around 2,000 times lighter than the hydrogen atom, the smallest thing they knew.
When the universe formed, it was a big bang, which left the universe as a sea of hydrogen, neutral hydrogen.
And when the very first stars and galaxies switched on, they ionized that hydrogen.
They're designing hydrogen bombs.
This happens after millions of years of heat and pressure have fused the star’s hydrogen into heavier elements like helium, carbon, and nitrogen— all the way to iron.
That way, we don't use fossil fuels or helium or hydrogen; we don't use solar panels or batteries or motors.
We weren't really aware that it would be so rich with sulfides, hydrogen sulfides.
Well, if the peak pH that cells have is around seven, those hydrogen bonds couldn't exist.
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