Bohr Atomic Model vs. Current Model of Atom

Attribute	Bohr Atomic Model	Current Model of Atom
Year Proposed	1913	1926
Proposed by	Niels Bohr	Erwin Schrödinger, Werner Heisenberg
Electron Orbits	Fixed circular orbits	Probability clouds or orbitals
Quantum Mechanics	Introduced quantization of angular momentum	Based on wave-particle duality
Electron Movement	Electrons move in specific orbits	Electrons move in a probabilistic manner

Introduction

Since the early 20th century, our understanding of the atom has evolved significantly. Two key models that have shaped our understanding are the Bohr Atomic Model and the Current Model of Atom. While the Bohr model was groundbreaking in its time, the current model has built upon its foundation to provide a more comprehensive explanation of atomic structure.

Bohr Atomic Model

The Bohr Atomic Model, proposed by Niels Bohr in 1913, was a significant advancement in the field of atomic theory. One of the key features of this model was the concept of quantized energy levels, where electrons orbit the nucleus in specific, fixed orbits. This model also introduced the idea of electron shells, with each shell corresponding to a specific energy level. The Bohr model successfully explained the spectral lines of hydrogen and provided a framework for understanding atomic structure.

• Quantized energy levels
• Fixed electron orbits
• Electron shells
• Explanation of spectral lines

Current Model of Atom

The Current Model of Atom, also known as the Quantum Mechanical Model, has superseded the Bohr model as the most widely accepted model of atomic structure. This model is based on the principles of quantum mechanics and wave-particle duality. In the current model, electrons are described by probability distributions known as orbitals, rather than fixed orbits. This model provides a more accurate description of electron behavior and has been successful in explaining the properties of all elements in the periodic table.

• Quantum mechanics principles
• Wave-particle duality
• Electron probability distributions
• Explanation of periodic table properties

Comparison of Attributes

While both the Bohr Atomic Model and the Current Model of Atom have contributed significantly to our understanding of atomic structure, there are key differences between the two models. One of the main differences is the treatment of electron behavior. In the Bohr model, electrons are depicted as moving in fixed orbits around the nucleus, while in the current model, electrons are described by probability distributions that indicate the likelihood of finding an electron in a particular region of space.

Another difference between the two models is the concept of energy levels. In the Bohr model, electrons occupy specific energy levels corresponding to their orbits, while in the current model, electrons are described by energy levels that are more fluid and continuous. The current model also takes into account the concept of electron spin, which was not addressed in the Bohr model.

Additionally, the Bohr model is limited in its ability to explain the behavior of atoms beyond hydrogen, as it was primarily developed to describe the simplest atom. In contrast, the current model has been successful in explaining the properties of all elements in the periodic table, making it a more comprehensive model of atomic structure.

Conclusion

In conclusion, while the Bohr Atomic Model was a significant advancement in the field of atomic theory, the Current Model of Atom has built upon its foundation to provide a more comprehensive and accurate description of atomic structure. The current model, based on quantum mechanics principles, has successfully explained the properties of all elements in the periodic table and has revolutionized our understanding of the atom. Both models have played a crucial role in shaping our understanding of atomic structure, and continue to be studied and refined by scientists today.