structure and bonding Flashcards
(6 cards)
1
Q
Explain difference in intermolecular bonding:
ethanal 21
ethanol 78
ethanoic acid 118
A
OH and COOH both hydrogen bonds;
COOH stronger H bonds; so more energy needed to break;
O permanent dipole-dipole
2
Q
Trend in boiling points down group 7
A
boiling point decreases
more electrons
increased london forces
3
Q
Ionic bonding
A
strong electrostatic forces of attraction between oppositely charged ions held in a lattice
4
Q
Simple molecular
A
Strong covalent bonds, weak Van Der Waals forces
5
Q
Metallic bonding
A
attraction between the positive metal ions and delocalised electrons
6
Q
What increases electronegativity
A
small atomic radius
decreased shielding
increases electron number
