7) Periodicity Flashcards
(4 cards)
1
Q
Define first ionisation energy.
A
The removal of one mole of electrons from 1 mole of gaseous atoms.
2
Q
Define second ionisation energy.
A
The removal of one mole of electrons from 1 mole of gaseous 1+ ions.
3
Q
Which three things must be mentioned when describing trends in periodicity?
A
Nuclear charge/number of protons
Shielding effect
Distance from nucleus
4
Q
Define metallic bonding.
A
The electrostatic attraction between cations and a sea of delocalised electrons.
