Ionisation Energy Flashcards
1
Q
How do 1st ionisation energies change down a group?
A
Decrease
2
Q
How do 1st ionisation energies change across a period?
A
Increase
3
Q
What does repulsion between 2 electrons in an orbital mean?
A
Electrons easier to remove from shared orbitals
4
Q
What is ionisation?
A
Process of becoming an ion
5
Q
What is ionisation energy?
A
Energy required to remove 1 mole of electrons from 1 mole of atoms in the gaseous state
6
Q
Unit for ionisation energy
A
KJmol-1
7
Q
Ionisation equation for Mg
A
Mg(g) —> Mg+(g) + e-
8
Q
What is 1st ionisation energy?
A
1st electron being removed from a neutral atom
9
Q
What is 2nd ionisation energy?
A
2nd electron being removed from a 1+ ion
10
Q
What does 2nd ionisation energy require more of?
A
Energy as electron is removed from positive ion
