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Atomic Theory Timeline and Models: Democritus, Dalton, and Thomson

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Atomic Theory Timeline and Models: Democritus, Dalton, and Thomson
  • Democritus, born around 460/470 BC, was the first to introduce the atomic theory and theorized that all materials are made up of indivisible 'atoms'
  • John Dalton, in 1803, expanded on the theory, stating that all atoms of an element are the same and conducted experiments to support his speculations
  • J.J. Thomson, in 1897, discovered the electron and proposed the plum pudding model of the atom
  • Ernest Rutherford, in 1909, concluded that atoms have a positively charged nucleus and electrons orbit around it
  • The atomic theory timeline shows the progression of our understanding of the atom from the earliest philosophies to the modern-day atomic model

11/12/2022

4089


<h2 id="democritus">Democritus</h2>
<p>Democritus, born around 460/470 BC, was the first philosopher to introduce the atomic theory. He the

<h2 id="democritus">Democritus</h2>
<p>Democritus, born around 460/470 BC, was the first philosopher to introduce the atomic theory. He the

View


<h2 id="democritus">Democritus</h2>
<p>Democritus, born around 460/470 BC, was the first philosopher to introduce the atomic theory. He the

View


<h2 id="democritus">Democritus</h2>
<p>Democritus, born around 460/470 BC, was the first philosopher to introduce the atomic theory. He the

View


<h2 id="democritus">Democritus</h2>
<p>Democritus, born around 460/470 BC, was the first philosopher to introduce the atomic theory. He the

View


<h2 id="democritus">Democritus</h2>
<p>Democritus, born around 460/470 BC, was the first philosopher to introduce the atomic theory. He the

View

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Knowunity is the #1 education app in five European countries

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I love this app so much, I also use it daily. I recommend Knowunity to everyone!!! I went from a D to an A with it :D

Philip, iOS User

The app is very simple and well designed. So far I have always found everything I was looking for :D

Lena, iOS user

I love this app ❤️ I actually use it every time I study.

Can't find what you're looking for? Explore other subjects.

Knowunity is the #1 education app in five European countries

Knowunity has been named a featured story on Apple and has regularly topped the app store charts in the education category in Germany, Italy, Poland, Switzerland, and the United Kingdom. Join Knowunity today and help millions of students around the world.

Ranked #1 Education App

Download in

Google Play

Download in

App Store

Knowunity is the #1 education app in five European countries

4.9+

Average app rating

13 M

Pupils love Knowunity

#1

In education app charts in 11 countries

950 K+

Students have uploaded notes

Still not convinced? See what other students are saying...

iOS User

I love this app so much, I also use it daily. I recommend Knowunity to everyone!!! I went from a D to an A with it :D

Philip, iOS User

The app is very simple and well designed. So far I have always found everything I was looking for :D

Lena, iOS user

I love this app ❤️ I actually use it every time I study.

View

Atomic Theory Timeline and Models: Democritus, Dalton, and Thomson

Atomic Theory Timeline and Models: Democritus, Dalton, and Thomson

  • Democritus, born around 460/470 BC, was the first to introduce the atomic theory and theorized that all materials are made up of indivisible 'atoms'
  • John Dalton, in 1803, expanded on the theory, stating that all atoms of an element are the same and conducted experiments to support his speculations
  • J.J. Thomson, in 1897, discovered the electron and proposed the plum pudding model of the atom
  • Ernest Rutherford, in 1909, concluded that atoms have a positively charged nucleus and electrons orbit around it
  • The atomic theory timeline shows the progression of our understanding of the atom from the earliest philosophies to the modern-day atomic model

11/12/2022

4089


<h2 id="democritus">Democritus</h2>
<p>Democritus, born around 460/470 BC, was the first philosopher to introduce the atomic theory. He the

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<h2 id="democritus">Democritus</h2>
<p>Democritus, born around 460/470 BC, was the first philosopher to introduce the atomic theory. He the

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<h2 id="democritus">Democritus</h2>
<p>Democritus, born around 460/470 BC, was the first philosopher to introduce the atomic theory. He the

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Access to all documents

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<h2 id="democritus">Democritus</h2>
<p>Democritus, born around 460/470 BC, was the first philosopher to introduce the atomic theory. He the

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<h2 id="democritus">Democritus</h2>
<p>Democritus, born around 460/470 BC, was the first philosopher to introduce the atomic theory. He the

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<h2 id="democritus">Democritus</h2>
<p>Democritus, born around 460/470 BC, was the first philosopher to introduce the atomic theory. He the

Register

Sign up to get unlimited access to thousands of study materials. It's free!

Access to all documents

Join milions of students

Improve your grades

By signing up you accept Terms of Service and Privacy Policy

Can't find what you're looking for? Explore other subjects.

Knowunity is the #1 education app in five European countries

Knowunity has been named a featured story on Apple and has regularly topped the app store charts in the education category in Germany, Italy, Poland, Switzerland, and the United Kingdom. Join Knowunity today and help millions of students around the world.

Ranked #1 Education App

Download in

Google Play

Download in

App Store

Knowunity is the #1 education app in five European countries

4.9+

Average app rating

13 M

Pupils love Knowunity

#1

In education app charts in 11 countries

950 K+

Students have uploaded notes

Still not convinced? See what other students are saying...

iOS User

I love this app so much, I also use it daily. I recommend Knowunity to everyone!!! I went from a D to an A with it :D

Philip, iOS User

The app is very simple and well designed. So far I have always found everything I was looking for :D

Lena, iOS user

I love this app ❤️ I actually use it every time I study.