Group 2 Flashcards
1
Q
why does the first ionisation energy of group 2 elements decrease down the group
A
As you go down group 2 there’s an increase in shielding
There is a weaker attraction between the nucleus and the outer electron
2
Q
what’s the equation for the third ionisation energu of magnesium being measured
A
Mg2+(g) => Mg3+ (g) + e-
3
Q
why is the third ionisation energy of magnesium higher than the second ionisation energy of magnesium
A
the electron is removed from 2p sub shell
The electron being removed is less shielded than 3s
