This is a document Created by a School in Essex
This is for GCSE Edexcel Chemistry Purposes
It includes simple explanations with examples and images so you can understand key concepts. There are also worksheets you can do as practice.
By a Future Year 10 Student
Brentwood School
IGCSE Chemistry
Atomic Structure
Revision Notes and Questions
,Syllabus Points 3
Atoms 4
Isotopes 7
Relative Atomic Mass (Ar) 8
Elements, Atoms and Compounds 10
The Periodic Table 11
Electron Configuration 12
Worksheets 16
2
, Syllabus Points
Atomic structure
Students should:
1.14 know what is meant by the terms atom and molecule
1.15 know the structure of an atom in terms of the positions, relative masses and relative
charges of sub-atomic particles
1.16 know what is meant by the terms atomic number, mass number, isotopes and relative
atomic mass (Ar)
1.17 be able to calculate the relative atomic mass of an element (Ar) from isotopic
abundances
1.18 understand how elements are arranged in the Periodic Table:
● in order of atomic number
● in groups and periods.
1.19 understand how to deduce the electronic configurations of the first 20 elements from
their positions in the Periodic Table
1.21 identify an element as a metal or a non-metal according to its position in the Periodic
Table
1.22 understand how the electronic configuration of a main group element is related to its
position in the Periodic Table
1.23 understand why elements in the same group of the Periodic Table have similar chemical
properties
1.24 understand why the noble gases (Group 0) do not readily react
3
, Atoms
Atoms have a small central __________, which is made up of
_________ and ________ and around which there are ___________.
Name of Particle Relative Mass Relative Charge
The atom is made up of three types of particle. P_______ and
N________ (which are found in the _________) and E________
which ________ the central n_______.
The Atomic Number tells us the number of p______ in an atom which
also happens to be the number of e_______.
The Mass Number tells us the total number of p_____ and n______.
Remember: Atoms have no overall charge because they have the
__________ number of _________ and _________.
4
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