First electron affinity Flashcards
1
Q
what is first electron affinity
A
the energy change when an electron is added to each atom in 1 mole of gaseous atoms
2
Q
equation
A
0(g) + e- = 0(g)-
3
Q
trend down a group
A
decreases shells electron being added to further from nucleus
more shielding inner shells
F and O exceptions
4
Q
Trends going across
A
same as ionisation
