Copy - Bohr Atom Teorisi-Modern Atom Teorisi

Bohr's atomıc theory & Modern atomıc theory

BOHR'S Atomıc theory

1. The electron moves in circular orbits at specific distances from the nucleus. These orbits are called energy levels or shells. An electron moving in a circular orbit around the nucleus possesses both kinetic and potential energy.

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1. The electron moves in circular orbits at specific distances from the nucleus. These orbits are called energy levels or shells. An electron moving in a circular orbit around the nucleus possesses both kinetic and potential energy.

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2. As the distance from the nucleus increases, the energy of the orbits also increases.

According to the Bohr atomic model, some electrons are represented by letters in the given diagram. Let's answer the following questions based on this visual representation.

Question 1/4

Compare the energies of the electrons labeled a and b.

Question 2/4

Compare the energies of the electrons labeled b,e and g.

Question 3/4

How is the energy level of the electrons labeled a and b expressed?

Question 4/4

How is the energy level of the electrons labeled f and g expressed?

3. An electron resides in its lowest possible energy level unless it is excited by an external source of energy. This state is called the ground state.

electron

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4. When energy is given to an atom, its electrons can move to higher energy levels. This is called the excited state. An atom with one or more electrons in a higher energy level is referred to as an excited atom.

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Ground State

4. When energy is given to an atom, its electrons can move to higher energy levels. This is called the excited state. An atom with one or more electrons in a higher energy level is referred to as an excited atom.

electron

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Exited State

Ground State

5. When an atom in the ground state absorbs energy, an electron can jump from one orbit to another. During this transition, the absorbed energy is equal to the difference in energy between the two orbits. This process is called absorption.

6. An excited atom is unstable and can release some or all of its excess energy by emitting radiation equal to the energy difference between orbits. This allows the atom to move to a lower energy state. The process of releasing energy as radiation is called emission.

Which one of the following figures represents the Bohr's Atomic Model?

Which one of the following figures represents the Bohr's Atomic Model?

Worng AnswerTry Again

shortcommings of bohr's atomıc theory

The Bohr atomic theory is valid only for hydrogen atoms and single-electron ions, while it proves inadequate for multi-electron systems

Bohr proposed that electrons move in circular paths (energy levels) at specific orbits. However, according to Heisenberg's uncertainty principle, the position and velocity of an electron in an atom cannot be precisely determined simultaneously. This principle does not explain that electrons do not actually move in well-defined orbits and that they have a probability distribution

Once it was understood that electrons exhibit both wave-like and particle-like properties, the Bohr atomic theory was found to be insufficient in explaining this phenomenon.

MODERN ATOMıc theory

1.It is not possible to determine exactly where an electron will be at a given moment (according to Heisenberg's uncertainty principle); however, regions within the atom where the electron is likely to be found can be defined. These regions are referred to as orbitals.

2. Orbitals can have different shapes and sizes.

2. Orbitals can have different shapes and sizes.

Bohr's Atomic Theory

Modern Atomic Theory

Probability

Atomic Nucleus

Orbit

Place of protons

The movement of electrons around the nucleus

Check Your Ansers

Three-dimensional movement of electrons

Drag and drop

Heisenberg's uncertainity principles

The planar motion of electrons

Orbital