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Di-Negative atoms are already electron rich in nature. This causes electron affinity is less. Since energy is needed to introduce another electron into the atom the process is endothermic.
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Is an element with a large negative electron affinity most likely to form a positive ion a negative ion or a neutral atom?
negative ion
The addition of an electron to an atom or molecule is called?
Reduction = addition of electrons. Generally negatively charged species is formed as a result
Why electron affinity of fluorine is large?
Electron affinity of an element is defined as the energy released by adding an electron to a gaseous atom of the element. With the electronic configuration of the fluroine atom being [Ne] 2s2 2p5, it needs just one more electron to form the fluoride ion (F-) which has the noble gas structure and is much more stable.
Why formation of di and tri-negaive ions is endothermic process?
when an electron is added to an atom, uninegative ion is formed and enrgy is released. the addition of one more electron is difficult because negative charge or electronic cloud repels it strongly, to overcome this repelsion an amount of energy is needed, which is obtained by surroundings so its an endothermic reaction.
When an ion gains electrons What is the charge?
Negative, when the ion gains an electron. When an ion loses an electron it becomes positive.
Does electron affinity gain electrons?
Yes. Electron affinity is the process by which a neutral atom gains an electron and the EA is the measure of energy released. The resulting ion will be negative.
Is an element with a large negative electron affinity most likely to form a positive ion a negative ion or a neutral atom?
negative ion
Definition of electron affinity?
The energy change that occurs when an electron is added to a neutral atom. This is usually exothermic. Noble Gases are excluded from this. Equation: X(element)+e-(electron)---------> X-1+ energy
What is the electron affinity of yttrium?
The electron affinity of yttrium is 29.6 kilojoules per mole. This is how much energy this element releases when added to a single neutral, gaseous molecule or atom to create a negative ion.
The addition of an electron to an atom or molecule is called?
Reduction = addition of electrons. Generally negatively charged species is formed as a result
Electron affinity is the enthalpy change during acquring or losing electrons?
is the amount of energy required to detach an electron from a singly charged negetive ion. X- ------> X + é
Why electron affinity of fluorine is large?
Electron affinity of an element is defined as the energy released by adding an electron to a gaseous atom of the element. With the electronic configuration of the fluroine atom being [Ne] 2s2 2p5, it needs just one more electron to form the fluoride ion (F-) which has the noble gas structure and is much more stable.
Why oxygen is having two electron affinity?
First EA is usually exothermic as energy is released when the nucleus attarcts an electron is larger than the energy taken in to overcome their inter-electronic repulsion. Second EA is always endothermic since electron is added to a negative ion. Energy is needed to overcome the repulsion between the two negatively charged species.
What would be the electrical charge of fluorine atom that gained an electron?
It would be -1 because gaining an electron will create a negative charge. F has a high electron affinity and therefore becomes an F- ion quite readily.
Why the value of electron affinity is positive for noble gases?
Noble gases have completely filled orbitals / energy levels. They generally have 8 valence electrons (helium has only 2) and have stable electronic configuration. They will not accept any more electrons and hence they have positive electron affinity.
Why formation of di and tri-negaive ions is endothermic process?
when an electron is added to an atom, uninegative ion is formed and enrgy is released. the addition of one more electron is difficult because negative charge or electronic cloud repels it strongly, to overcome this repelsion an amount of energy is needed, which is obtained by surroundings so its an endothermic reaction.
What has the author Melvin Walter Siegel written?
Melvin Walter Siegel has written: 'The electron affinity of nitric oxide and the molecular constants of its negative ion, determined by laser photoelectron spectroscopy'
