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Which scientists postulated that the sharp lines in the emission spectra of elements are caused by electrons moving from high energy levels to low energy levels?
Niels Bohr proposed this model in 1913. His model of the atom suggested that electrons occupy specific energy levels and emit or absorb energy in quanta when they move between these levels, corresponding to the sharp lines observed in the emission spectra of elements.
How are electrons structured in an atom?
Electrons are structured in specific energy levels or electron shells around the nucleus of an atom. These energy levels can hold a specific number of electrons, with the innermost shell able to hold up to 2 electrons and subsequent shells having higher capacities. Electrons in an atom occupy the lowest possible energy levels before filling higher-energy levels.
Do valence electrons have high energy levels?
Yes, valence electrons are found in the outermost energy level of an atom, which is generally the highest energy level for that atom. Valence electrons are involved in chemical bonding and reactions due to their relatively high energy compared to core electrons.
What is meant by energy level of an atom?
In a practical, simplified sense it is the orbital "shell" that an electron can occupy (quantum theory contends that electrons cannot occupy just any old space around a nucleus, but is restricted to specific "levels", "volumes" or "shells"). More general information is in the article in the link below.
What are the electrons that have high energy levels and are loose in an atom?
conduction band electrons detach themselves from atoms and become delocalized
How many electrons are in the outer level of tin?
from what i know from my teacher Mrs. Smith form the Brea jr high if i rember correctley it has 2 energy levels. if u need to contacht her her # is 714 990 7500 ext 107
What are the key differences between low spin and high spin chemistry?
Low spin and high spin chemistry refer to the behavior of electrons in transition metal complexes. In low spin complexes, electrons prefer to occupy lower energy orbitals, resulting in a smaller number of unpaired electrons. This leads to stronger bonding and more stability. In contrast, high spin complexes have electrons that occupy higher energy orbitals, leading to a larger number of unpaired electrons. This results in weaker bonding and lower stability. These differences in electron configuration can affect the reactivity and magnetic properties of the complexes.
What do you mean by the orbitals of lower energy are filled in first with the electron and only then the orbitals of high energy are filled?
Because the electrons have a negative charge and the nucleus has a positive charge, so they attract each other. The electrons stay in the orbital closest to the nucleus unless it is full or they have enough energy to move away from the nucleus.
Why is plastic a bad conductor of electricity?
Generally, the valence electrons in the atoms of the molecules in plastic hang out in Fermi energy levels lower than the energy bands that an electron would have to occupy to support conduction. The electrons are bound to parent atoms, and they also may have some mobility within the molecular matrix of the material, but any energy applied (like voltage) doesn't really get the attention of these electrons. They chill in energy levels too low to be jerked up into the conduction band with any fair amount of applied voltage. And if the electrons are not in or cannot easily reach the conduction band (an energy level high enough to support current flow), the material won't support conduction and is said to be a bad conductor.
What happens to electrons when they are raised into high energy levels?
When electrons are raised to high energy levels, they absorb energy, typically from photons, causing them to move to an excited state or a higher orbital. This process is called excitation. In this elevated state, electrons are less stable and may eventually return to a lower energy level, releasing the absorbed energy in the form of light or heat. This transition is fundamental to various processes, including the emission of light in fluorescent materials and the behavior of atoms in chemical reactions.
What is a high energy electron and how does it differ from low energy electrons in terms of their behavior and impact on various processes?
A high energy electron has more kinetic energy and moves faster than a low energy electron. This difference in energy levels affects their behavior and impact on processes. High energy electrons are more likely to participate in chemical reactions, ionize atoms, and cause damage to biological molecules. In contrast, low energy electrons are less reactive and tend to be more stable, playing a smaller role in these processes.
If you shoot very high energy electrons at a metal target can you can make X-rays?
Yes, when high energy electrons are shot at a metal target, they can knock inner-shell electrons out of their orbits. As outer-shell electrons fall back to fill these vacancies, they release energy in the form of X-rays due to the difference in energy levels between shells. This process is known as Bremsstrahlung radiation.
