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There is a greater repulsive force from the negatively charged anion, thus causing the addition of successive electrons to be electrically unfavorable. Energy is necessary to overcome the electrostatic repulsion, making additional electron affinities endothermic.
For the same reason, the noble gases and nitrogen absorb energy even for their first ionization energy. Greater stability = energy released. It requires energy to disrupt that stability.
What else can I help you with?
Why does Cs Ba Sr have a low electron affinity?
Cs (cesium), Ba (barium), and Sr (strontium) have low electron affinities primarily due to their large atomic radii and low effective nuclear charge experienced by valence electrons. As alkali and alkaline earth metals, they tend to lose electrons rather than gain them, making the addition of an electron less favorable. Additionally, the energy required to add an electron to these elements is often less than the energy released during the process, leading to low or even positive electron affinity values.
What can be said of the amount of energy that an electron absorbs when it is excited compared to the amount of energy that it releases when it returns to ground state?
When an electron is excited, it absorbs a specific amount of energy to move to a higher energy state. When it returns to its ground state, it releases this absorbed energy in the form of electromagnetic radiation. The energy released is equal to the energy absorbed during excitation, following the principle of conservation of energy.
What is a proton in the nucleus converted into what during electron capture?
During electron capture, an electron and proton combine and are converted to a neutron.
Is energy absorbed or released during freezing?
Energy is released during freezing.
What makes photons deflect in a hydrogen atom?
In a hydrogen atom, photons can be deflected due to the interaction with the electric field generated by the electron's charge. When a photon approaches the atom, it can be absorbed by the electron, causing the electron to transition to a higher energy state. After a brief moment, the electron may return to its original state, emitting a photon that is often deflected from its initial path due to changes in momentum during the absorption and emission process. This process can also be influenced by quantum effects, such as scattering.
Why are most electron affinities negative numbers?
Most electron affinities are negative because when an electron is added to an atom, energy is released. This released energy causes the system to become more stable, resulting in a negative change in energy. The negative sign indicates that energy is released during the process.
If energy is absorbed during electron sharing the process is said to be?
endothermic
If you make the electron jump downward then return it to the outer ring what do you notice about the photon released or absorbed?
When an electron jumps downward to a lower energy state in an atom, it releases energy in the form of a photon which is emitted. When the electron returns to the outer ring, it absorbs energy in the form of a photon. The energy of the photon absorbed is equal to the energy of the photon released during the downward jump.
Why does Cs Ba Sr have a low electron affinity?
Cs (cesium), Ba (barium), and Sr (strontium) have low electron affinities primarily due to their large atomic radii and low effective nuclear charge experienced by valence electrons. As alkali and alkaline earth metals, they tend to lose electrons rather than gain them, making the addition of an electron less favorable. Additionally, the energy required to add an electron to these elements is often less than the energy released during the process, leading to low or even positive electron affinity values.
What can be said of the amount of energy that an electron absorbs when it is excited compared to the amount of energy that it releases when it returns to ground state?
When an electron is excited, it absorbs a specific amount of energy to move to a higher energy state. When it returns to its ground state, it releases this absorbed energy in the form of electromagnetic radiation. The energy released is equal to the energy absorbed during excitation, following the principle of conservation of energy.
Why anion formation is exothermic?
During the Formation of postitve ion we have to break the force attraction between nuecleus and electron. while doing so energy is absorbed and process become endothermic.
How many photons are absorbed during light reaction?
During the light reactions of photosynthesis, hundreds to thousands of photons may be absorbed by a single chlorophyll molecule in the reaction center of a photosystem. These photons provide the energy needed to drive the electron transport chain and convert light energy into chemical energy in the form of ATP and NADPH.
What thing is absorbed by chlorophyll during photosynthesis?
Light is absorbed during photosynthesis. (That's the meaning of photo!)
WHAT HAPPENS IN THE PHOTOSYSTEM 2 protein when it is hit by a photon of light?
In photosystem II, the photon of light is absorbed by a pigment molecule, which causes an electron to become excited. This electron is then passed through a series of electron carrier molecules, creating a flow of electrons used to generate ATP and NADPH during the light-dependent reactions of photosynthesis.
What is the process to calculate the energy difference for electron transition in a given system?
To calculate the energy difference for an electron transition in a system, you can use the formula E hf, where E is the energy difference, h is Planck's constant, and f is the frequency of the transition. This formula helps determine the amount of energy absorbed or emitted during the electron transition.
What color wavelengths are absorbed during photosynthesis?
The green color is being absorbed
What is a proton in the nucleus converted into what during electron capture?
During electron capture, an electron and proton combine and are converted to a neutron.
