https://padlet.com/cmacapugay0221/4m1ioc1z0pzynzt Hola! Welcome to the padlet where you can study about the evolution of atomic models and the development of atomic theory. It's been more than 100 years since the discovery of atomic models and such. Atoms play a big part in Chemistry and I believe that we should all learn the discovery and evolution of atomic models and theories. en-us 2022-02-03 07:55:35 UTC 2022-02-07 08:11:18 UTC hello@padlet.com cmacapugay0221 https://padlet.com/cmacapugay0221/4m1ioc1z0pzynzt/wish/2026997766 Who: John Dalton is an English chemist who carried out a series of experiments that contributed to the adoption of the concept of atoms
When: 1803
What: According to Dalton's atomic theory, all elements are made up of atoms, and atoms of the same element are identical. While atoms of different elements are different, and compounds are formed by the joining of atoms of two or more elements.
Atomic Model: Solid Sphere Model]]> 2022-02-03 08:09:04 UTC https://padlet.com/cmacapugay0221/4m1ioc1z0pzynzt/wish/2026997766 cmacapugay0221 https://padlet.com/cmacapugay0221/4m1ioc1z0pzynzt/wish/2027009571 Who: Joseph John Thomson is also an English scientist who first suggested that an atom is made up of even smaller particles.
When: 1904
What: The Cathode Ray Experiment: J.J Thomson used two electrodes at either end of the tube to apply a high electric voltage. He noticed a particle stream, called a ray, traveling from the negatively charged electrode (cathode) to the positively charged electrode (anode). The cathode ray is the name for this type of beam. 
           Thomson's Plum Pudding Experiment Model: Like a plum (or raisin) in a pudding, an atom is a positively charged structure with negatively charged electrons strewn about.
Atomic Model: Plum Pudding Model

]]> 2022-02-03 08:16:51 UTC https://padlet.com/cmacapugay0221/4m1ioc1z0pzynzt/wish/2027009571 cmacapugay0221 https://padlet.com/cmacapugay0221/4m1ioc1z0pzynzt/wish/2027041637 Who: Ernest Rutherford is also a British scientist
When: 1919
What: His Gold foil experiment entailed spraying a small sheet of gold foil with a stream of tiny positively charged particles (2000 atoms thick)
Atomic Model: Nuclear Model ]]> 2022-02-03 08:38:24 UTC https://padlet.com/cmacapugay0221/4m1ioc1z0pzynzt/wish/2027041637 cmacapugay0221 https://padlet.com/cmacapugay0221/4m1ioc1z0pzynzt/wish/2027047455 Who: Niels Bohr is a Danish scientist who proposed a solution. He assigned each electron to a specific energy level in his model.
When: 1913
What: Electrons orbit the nucleus in precise orbits, similar to how planets orbit the sun. These orbits, or energy levels, are spaced apart from the nucleus at specific distances.
Atomic Model: Planetary Model]]> 2022-02-03 08:42:54 UTC https://padlet.com/cmacapugay0221/4m1ioc1z0pzynzt/wish/2027047455 cmacapugay0221 https://padlet.com/cmacapugay0221/4m1ioc1z0pzynzt/wish/2027053737 Who: Erwin Schrödinger is an Austrian physicist who improved on the Bohr atom model. He described the possibility of detecting an electron in a specific position using mathematical equations
When: 1926
What: The Quantum Mechanical Model does not define an electron's exact path, but rather forecasts the probability of the electron's position.
Atomic Model: The Quantum Mechanical Model]]> 2022-02-03 08:47:14 UTC https://padlet.com/cmacapugay0221/4m1ioc1z0pzynzt/wish/2027053737 cmacapugay0221 https://padlet.com/cmacapugay0221/4m1ioc1z0pzynzt/wish/2027058314 Who: James Chadwick
When: 1932
What: This radiation was thought to be made up of particles with a neutral electrical charge and the mass of a proton. Everything is made up of atomos, which is too small to be seen with the naked eye. Between these core layers of matter, there are empty gaps. Solid particles are the building blocks of matter. The structure of matter is consistent throughout. Matter comes in a variety of shapes, sizes, and weights.]]> 2022-02-03 08:51:00 UTC https://padlet.com/cmacapugay0221/4m1ioc1z0pzynzt/wish/2027058314 cmacapugay0221 https://padlet.com/cmacapugay0221/4m1ioc1z0pzynzt/wish/2031038496 Who: Democritus is a Greek philosopher. He was the one who came up with the term "atom."
When: Around 400 B.C
What: His theory that matter is made up of extremely little, indivisible objects (Atomos) that can't be broken down any further. Solid particle are the building blocks of matter. The assumption is that matter has a consistent structure throughout. Stated matter comes in a variety of shapes, sizes, and weights.]]> 2022-02-06 00:22:40 UTC https://padlet.com/cmacapugay0221/4m1ioc1z0pzynzt/wish/2031038496