Which element has highest electron affinity among halogens?
chlorine
Why do halogens have high electron affinity?
Electron affinity reflects the ability of an atom to accept an electron. Group VIIA elements, the halogens, have highest electron affinities because the addition of an electron to an atom results in a completely filled shell.
Which F Cl has the highest electron affinity and why?
Now coming to the question, as we have already seen; Br has the lowest electron affinity because of high atomic size and therefore has less tendency to accept electrons to form anion whereas Cl has highest electron affinity because of less atomic size and has high tendency to accept electrons.
Does sodium have high electron affinity?
The first ionization energy for sodium is one and one-half times larger than the electron affinity for chlorine. Thus, it takes more energy to remove an electron from a neutral sodium atom than is given off when the electron is picked up by a neutral chlorine atom.
Why does sodium have a positive electron affinity?
Ionisation of sodium(or any atom) is endothermic process (495.8 KJ/mol), meaning, in isolated gaseous state, neutral atom is more stable, Electron gain process of Na+ is obviously an exothermic process (reverse of ionisation) due to attraction of Positively charged, Na+ for a free electron.
What alkaline earth metal has the highest electron affinity?
Beryllium Magnesium
What is the most similar about the alkaline earth metals?
Alkaline earth metalsA group of chemical elements in the periodic table with similar properties: shiny, silvery-white, somewhat reactive at standard temperature and pressure. They readily lose their two outermost electrons to form cations with charge +2.
What are the two most common alkaline metals?
Alkaline-earth metal, any of the six chemical elements that comprise Group 2 (IIa) of the periodic table. The elements are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
Why calcium is more reactive than magnesium?
The alkaline-earth metals tend to lose two electrons to form M 2+ ions (Be2+, Mg2+, Ca2+, and so on). These metals are less reactive than the neighboring alkali metal. Magnesium is less active than sodium; calcium is less active than potassium; and so on. These metals become more active as we go down the column.