C4: Predicting and Identifying Reactions and Products

C4.2 How do chemists explain the patterns in the properties of elements? At the centre of every atom is a nucleus containing protons and neutrons and electrons arranged in shells around the nucleus. All atoms of the same elements have the same number of protons An...

C4.1 What are the patterns in the properties of elements Elements are the ‘building blocks’ of all materials – the atoms of each element have a different proton number. The elements are arranged in order of ascending atomic (or proton) number, this is the number of...