440 BCE is when he first came up with this theory. He thought that everything was made up of small particles that varied in shape, now called "Atoms"
My name is Democritus. My theory is that EVERYTHING in the world is made up of tiny particles! I call these "Atmos".
Im John Dalton, and my theory is that all matter breaks down into different types of atoms
In about 1808, John Dalton added to Democritus' theory, saying all common substances break down into the same elements.
The periodic table was made by Dmitri Mendeleev. He made the table and sorted them by placing them on the table by atomic mass of each of the elements
Hello, Im Dmitri Mendeleev. I am the person who created the periodic table! Which was a break through in the science community
JJ Thompson discover these negatively charged cells but the name of these cells were changed to "electrons".
My name is JJ Thompson, and I discover that there are negatively charged cells which I call corpucles, as I model I used what I called the Pudding Model
In 1910, Ernest proved that the atom consisted of a small, dense positively charged nucleus.
My name is Ernest Rutherford, and I contributed to the matter theory with my discovery of the nucleus!
In 1932, James discovered that there Neutrons inside the Nucleus
Hello, Im James Chadwick. I discovered that there are Neutrons that are found inside the Nucleus.
