Search for notes by fellow students, in your own course and all over the country.
Browse our notes for titles which look like what you need, you can preview any of the notes via a sample of the contents. After you're happy these are the notes you're after simply pop them into your shopping cart.
Title: Short Note in Introduction to Periodic Chemistry For Students
Description: Its an essential tool that will help students understand topics better and in exchange help them excell in their final exam
Description: Its an essential tool that will help students understand topics better and in exchange help them excell in their final exam
Document Preview
Extracts from the notes are below, to see the PDF you'll receive please use the links above
AQA Chemistry A-level
3
...
1: Periodicity
Detailed Notes
https://bit
...
ly/pmt-cc
CC BY-NC-ND 4
...
ly/pmt-edu
https://bit
...
ly/pmt-cc
3
...
1
...
All the elements
along a period have the same number of electron shells
...
Elements are classified into blocks within the Periodic Table that show electron configuration:
s-block = groups 1 and 2
p-block = groups 3 to 0
d-block = transition metals
f-block = radioactive elements
These different electron configurations are often linked to other trends within the Periodic
Table
...
Atomic Radius
Along a period, atomic radius decreases
...
The outer electrons are pulled in closer to the nucleus as the
increased charge produces a greater attraction
...
Down a group, atomic radius increases
...
This increases the distance between the outer electrons and the nucleus,
reducing the power of attraction
...
Therefore the nuclear attraction
is reduced further and atomic radius increases
...
ly/pmt-edu
https://bit
...
ly/pmt-cc
Ionisation Energy
Along a period, ionisation energy increases
...
Down a group, ionisation energy decreases
...
3
...
1
...
Their melting points
increase due to greater positive charged ions (Na = +1, Mg = +2, Al = +3)
...
Silicon is macromolecular meaning it has a very strong covalent structure
...
Phosphorus, sulphur and chlorine are all simple covalent molecules held with weak van der
waals forces
...
https://bit
...
ly/pmt-cc
https://bit
...
This
makes the atom very stable and the van der waals forces between them very weak
...
https://bit
...
ly/pmt-cc
https://bit
Title: Short Note in Introduction to Periodic Chemistry For Students
Description: Its an essential tool that will help students understand topics better and in exchange help them excell in their final exam
Description: Its an essential tool that will help students understand topics better and in exchange help them excell in their final exam