electron affinity
Moderators: Chem_Mod, Chem_Admin
-
- Posts: 82
- Joined: Fri Sep 29, 2023 11:21 am
Re: electron affinity
Generally, electron affinity increases left to right. This is because, as you move from left to right across a period, the atomic size decreases, and the effective nuclear charge experienced by the electrons increases. The electron affinity tends to decrease from top to bottom. As you move down a group, the atomic size increases due to the addition of more energy levels. The outer electrons are farther from the nucleus, experiencing weaker attractive forces.
-
- Posts: 90
- Joined: Fri Sep 29, 2023 12:29 pm
Re: electron affinity
Hello!
To answer your question on what the trends on the periodic table are about electron affinity,
Electron affinity tends to increase across a period (left and right), and decrease down a group (top and bottom.) Within a period, the atomic size decreases and effective nuclear charge will increase, causing a stronger attraction for an additional electron and lead to a higher electron affinity. As you move down a group, the size of an atom will increase and outer electrons will move farther from the nucleus to cause a weaker attraction for an additional electron and lead to a lower electron affinity.
I believe some exceptions to the rule are elements in Group 2 (alkaline earth metals), halogens in Group 17, noble gases, and transition metals.
I hope this helps!
To answer your question on what the trends on the periodic table are about electron affinity,
Electron affinity tends to increase across a period (left and right), and decrease down a group (top and bottom.) Within a period, the atomic size decreases and effective nuclear charge will increase, causing a stronger attraction for an additional electron and lead to a higher electron affinity. As you move down a group, the size of an atom will increase and outer electrons will move farther from the nucleus to cause a weaker attraction for an additional electron and lead to a lower electron affinity.
I believe some exceptions to the rule are elements in Group 2 (alkaline earth metals), halogens in Group 17, noble gases, and transition metals.
I hope this helps!
Return to “Trends in The Periodic Table”
Who is online
Users browsing this forum: No registered users and 2 guests