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Why does the free electron theory fail to predict the semiconducting properties of materials?
Drawbacks of Classical free electron theory:
1. It is macroscopic theory
2. This theory cannot explain the electron conductivity of
semiconductors and insulators.
3. Ferromagnetism cannot be explained by this theory.
4. This theory cannot explain the Photoelectric effect, Compton
effect and the Black Body radiation.
5. The calculated value of specific heat of metals is not matching
with the experimental value.
6. At low temperature, Lorentz number is not a constant. But by
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classical theory it is a constant.
7. Dual nature cannot be explained.
8. Atomic fine spectra cannot be explained.
9. Classical theory states that all the free electrons will absorb
energy, but quantum theory states that only few electrons will
absorb energy
What else can I help you with?
What are the importance of phase diagrams to a metallurgist?
Phase diagrams are crucial for metallurgists as they provide essential information about the phases present in metal alloys at different temperatures and compositions. They help in understanding the stability of various phases, guiding alloy design and heat treatment processes. By interpreting phase diagrams, metallurgists can predict properties such as strength, ductility, and corrosion resistance, enabling them to optimize material performance for specific applications. Overall, phase diagrams are vital tools for making informed decisions in materials engineering and processing.
What is a tensile tester machine used for?
It is a scientific machine that applies tension to an item until it fails. It is used for quality control and to know the durability of certain items. It can also determine how certain forces will effect the material. For example, it could predict how certain weather forms effect housing materials.
Use future in a sentence?
It can be difficult to predict what the stock market will do in the future.
How can genetic counselors predict genetic disorders?
Well certain disorders are found on certain chromosomes and on certain parts of the chromosome. How they find out how, i don't know. But if some pieces of a specific chromosome they can predict they will have a certain disorder
What are some process activities that help predict changes in software?
Prototyping Incremental delivering
How did Mendeleev predict the properties of silicon?
Mendeleev did not predict the properties of silicon.
What can you use on the periodic table of elements to tell you about a certain chemical?
We can predict the electron configuration, some chemical and physical properties, the atomic weight, etc.
What elements predict the properties of ekasilicon?
The properties of element 114, also known as ekasilicon, are mainly predicted based on its position in the periodic table. Similar to silicon, ekasilicon is expected to exhibit some semiconducting properties due to its position in the carbon group. Its properties may also be influenced by its electron configuration and atomic structure. Additional experimental data may be needed to accurately determine its physical and chemical properties.
What do quantum numbers tell us about the properties of an electron in an atom?
Quantum numbers provide information about the energy, position, and spin of an electron in an atom. They help us understand the arrangement of electrons in different orbitals and predict their behavior within the atom.
Elements in the same group or family share important?
Elements in the same group or family share important chemical properties, such as valence electron configuration and reactivity. They typically have similar physical and chemical behaviors due to their similar electron configurations. This organization helps predict element properties and chemical reactions.
Why it is important to study crystal structure?
Studying crystal structure is important because it helps scientists understand the physical and chemical properties of materials. By knowing how atoms are arranged in crystals, researchers can predict how they will interact with light, heat, and other materials. This knowledge is crucial for designing new materials with specific properties for various applications.
What is the significance of the wavefunction of an electron in quantum mechanics?
The wavefunction of an electron in quantum mechanics describes its probability distribution, showing where the electron is likely to be found. This is significant because it allows us to understand and predict the behavior of electrons in atoms and molecules, leading to advancements in technology such as computers and materials science.
How was Dmitri Mendeleev able to predict the properties of germanium?
Dmitri Mendeleev was able to predict the properties of germanium by leaving gaps in his periodic table for elements that were yet to be discovered. He noticed a pattern in the properties of known elements and used this pattern to predict the existence and properties of undiscovered elements, such as germanium.
How did Mendeleev's table predict properties?
luck
How have scientists arranged varios atoms?
Scientists have arranged various atoms into periodic tables based on their atomic number, electron configuration, and chemical properties. By organizing atoms in this way, scientists can study and predict the behavior of elements and their compounds more effectively. Additionally, advancements in technology allow scientists to manipulate and control atoms to create new materials and substances with specific properties.
What does a periodic table predict?
A periodic table predicts the properties and behavior of elements based on their atomic structure, such as atomic number, electron configuration, and chemical reactivity. It can be used to determine trends in properties like atomic size, electronegativity, and reactivity, aiding in understanding and predicting the behavior of elements in chemical reactions.
Why can't we just use the last electron configuration?
The last electron configuration represents the outermost electron shell of an atom, but it doesn't provide a complete picture of the atom's properties or behavior. To fully understand an element's chemical behavior, we need to consider the entire electron configuration, including all electron shells and subshells. This helps us predict how the electrons interact with other atoms and molecules.
