C1.1.1 Atoms + C.1.1.2 The periodic table

Mind Map by , created over 5 years ago

GCSE Chemistry (C1.1 The fundamental ideas in chemistry) Mind Map on C1.1.1 Atoms + C.1.1.2 The periodic table, created by fampulli on 05/26/2014.

Created by fampulli over 5 years ago
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C1.1.1 Atoms + C.1.1.2 The periodic table
1 All substances are made up of atoms
2 Element
2.1 A substance that is made up of only one type of atom
2.2 There are about 100 different elements
2.2.1 Which are shown in the periodic table, grouped into similar properties (a 'group' is one vertical column) They are also shown as metals... ...and non-metals
2.2.2 Grouped in the periodic table C1.1.2 The periodic table Elements in the same group have the same no. of electrons in their outer shells Giving them similar properties The elements in Group 0 are called the noble gases They are unreactive- their atoms have a stable arrangement of electrons
2.2.3 Each element is represented by a chemical symbol e.g O for Oxygen, Na for Sodium etc.. (These will be given to you in the exam)
3 An atom has a small central nucleus, made up of protons and neutrons
3.1 Around which there are sub-atomic particles called electrons
3.2 Relative charges: Protons: +1. Neutron: 0. Electron: -1.
3.3 In an atom, no. of protons = no. of electrons
3.3.1 Meaning atoms have no overall charge
3.4 All atoms of a particular element have the same number of electrons
3.4.1 and atoms of different elements have different numbers of protons
4 Atomic number
4.1 The number of protons in an atom of an element
5 Mass number
5.1 The sum of the protons and neutrons in an atom
6 Electrons
6.1 ... each occupy particular energy levels (or 'shells')
6.1.1 They occupy the lowest available energy level (innermost available shells) The first 3 innermost shells fill up as: 2, 8, 8

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