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Atomic Models
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Atomic Models
Dalton's model (1803)
- Dalton's model stated that matter is made of atoms: solid, indivisible spheres, identical within the same element and different between elements. They cannot be created or destroyed, only rearranged, forming compounds in fixed proportions.
- Dalton's model
- Dalton's model stated that matter is made of atoms: solid, indivisible spheres, identical within the same element and different between elements. They cannot be created or destroyed, only rearranged, forming compounds in fixed proportions.
Democrithus's model (around 400 B.C.)
- Democritus's model stated that all matter is made of atoms: eternal, indivisible particles, differing in shape and size, moving through empty space. The variety of substances comes from different combinations of these atoms.
- Democritus's model
- Democritus's model stated that all matter is made of atoms: eternal, indivisible particles, differing in shape and size, moving through empty space. The variety of substances comes from different combinations of these atoms.
Thomson's model (1897)
- Thomson's model stated that the atom was a solid positive sphere with electrons (negative charges) embedded in it, like raisins in a pudding. This model explained the electrical neutrality of matter and became known as the "plum pudding model."
- Thomson's model
- Thomson's model stated that the atom was a solid positive sphere with electrons (negative charges) embedded in it, like raisins in a pudding. This model explained the electrical neutrality of matter and became known as the "plum pudding model."
Rutherford's model (1911)
- Rutherford's model stated that the atom has a small, dense, positive nucleus where almost all the mass is concentrated, and that electrons orbit around it in regions that are mostly empty space. This model became known as the "nuclear model" of the atom.
- Rutherford's model
- Rutherford's model stated that the atom has a small, dense, positive nucleus where almost all the mass is concentrated, and that electrons orbit around it in regions that are mostly empty space. This model became known as the "nuclear model" of the atom.
Bohr's model (1913)
- Bohr's model stated that electrons orbit the nucleus in fixed paths, each with a specific energy level. They change orbits only by absorbing or emitting energy as light, becoming known as the "planetary model."
- Borh's model
- Bohr's model stated that electrons orbit the nucleus in fixed paths, each with a specific energy level. They change orbits only by absorbing or emitting energy as light, becoming known as the "planetary model."
Schrodinger's model
- Schrödinger's model stated that electrons do not move in fixed orbits, but instead exist in regions called electron clouds or orbitals, where there is the highest probability of finding them. This is the quantum model of the atom.
- Schrodinger's model
- Schrödinger's model stated that electrons do not move in fixed orbits, but instead exist in regions called electron clouds or orbitals, where there is the highest probability of finding them. This is the quantum model of the atom.
Intruduction
- Since ancient times, scientists have tried to understand the structure of matter. Over time, several atomic models were proposed, each contributing to a better explanation of the atom and its phenomena.
Conclusion
- Atomic models show the evolution of scientific knowledge. From Democritus’ indivisible atom to Schrödinger’s electron clouds, each model helped us understand matter and drive advances in modern science.
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- Descrição
- Mapa Mental sobre Atomic Models, criado por Beatriz Machado em 27-09-2025.
- Criado por
- Beatriz Machado
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