Other pages in this set

Page 2

Preview of page 2

Here's a taster:

Magnesiu Aluminiu
Element Sodium Silicon Phosphorus Sulphur Chlorine Argon
m m
1st ionization
496 738 577 786 1080 1000 1251 1520
energy (kJ mol1)
Giant Giant Giant Macro
Structure Molecular Molecular Molecular Atomic
Metallic Metallic Metallic Molecular
0.93 1.31 1.61 1.90 2.19 2.58 3.16 3.20
(Pauling scale)
Melting Point (K) 371 922 934 1683 317 390 172 84
Boiling Point (K) 1156 1363 2740 2628 553 718 239 87
electrical 0.218 0.224 0.382 0.001 <0.001 <0.001 <0.001 <0.…read more

Page 3

Preview of page 3

Here's a taster:

Periodicity…read more

Page 4

Preview of page 4

Here's a taster:

Atomic Radii:
These tell us about the size of atoms. We cannot measure the radius of an isolated atom because
there is no clear point at which the electron cloud density around it drops to zero. Half the distance
between the centres of a pair of atoms is used instead.
The atomic radius of an element can differ as it is a general term. It depends on the type of bond that
it is forming (covalent, ionic, metallic, van der Waals).…read more

Page 5

Preview of page 5

Here's a taster:

Ionisation Energies Cont.
Graph of 1st ionisation energies of elements in period 3
Aluminium (group 2) has lower ionisation energy than magnesium (group 3) because a new sub shell
is starting to be filled in aluminium, which is easier to remove.
Sulphur has lower first ionisation energy than phosphorus because in the outer 3p shell, it has a pair
of electrons in the sub-shell. This electron is repulsive and therefore makes it easier to remove.…read more


No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all resources »