Name: Elements, atoms and subatomic particles | High school chemistry | Khan Academy
Uploaded: 2021-07-05T12:44:53.000Z
Duration: 5 min 37 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

and the diversity of all the things we see,

from the scale of things in the cosmos like stars.

and all the way down to the microscopic scale.

This is a visualization of a coronavirus.

But an interesting question has always been,

things, a smaller set, a finite set of things

that we can put together to make up all of this complexity?

but now we know that there are things called elements,

that we know of in the universe is made up

of what we experience in our everyday lives is made up

of an even smaller subset of these elements.

on Earth is made up of these eight elements.

if you were to stare at your hand or look in the mirror,

hydrogen, carbon, nitrogen, oxygen, phosphorus, and sulfur.

Now, the earth and life is made up of other elements,

and how much can be made with combinations

of the things that we see in the periodic table of elements.

we can make things out of these elements,

but what if we were to keep cutting an element

or what if we were to keep cutting a substance down?

What is the smallest unit that still maintains

And that unit, you have probably heard the word,

it has subatomic particles known as protons

And then you could imagine buzzing around,

and we're talking about very, very small scale,

It's more of a probability where you might find these,

but buzzing around that nucleus, you have electrons,

and the electrons have a negative charge.

But everything we're talking about is made up

of combinations of these three fundamental particles,

but then these atoms are just buzzing around

And what actually gives an atom the properties

what makes an atom a hydrogen is it has one proton.

What makes an atom a chlorine is that it has 17 protons.

and that might change how it interacts with other atoms,

but it still will be classified as a, for example, carbon,

but it will affect the mass that we're dealing with.

But even if you change the number of neutrons

no matter how many neutrons or electrons you have,

And it's really interesting to appreciate

but the width of a carbon atom is roughly one times 10

and it depends on the context you're seeing the carbon,

but roughly speaking, if you took 10-billion carbons

and put them side by side, it would be about a meter wide.

Or if you wanna blow your mind even further,

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Elements, atoms and subatomic particles | High school chemistry | Khan Academy

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