Category: chemistry gcse

An Understanding of the Structure of an Atom – Chemistry GCSE

We all are familiar with the word atom in chemistry . It has been derived from a Greek word a-tomio which means “uncut-able” or “non- divisible”. According to the Indian and Greek philosophers the continued subdivisions of matter leads to atom which cannot be divided further. Hence they …

Chemical Detection C3 Topic 3 – Chemistry Extension GCSE

This article will go into detail Topic 3, Chemical Detection which includes analysing substances, test for positive an negative ions, acids and alkalis, calculating moles, Avogadro’s law and titration. However, you are more than welcome to skip to the parts most relevant to you.Analysing SubstancesThere are two ways you can analyse a substance: …

The 10 Properties of Alkali Metals

Firstly, before we find out the properties of alkali metals, we need to know what they actually are. An alkali metal is located in group 1 on the periodic table which includes (top to bottom) Lithium, Sodium, Potassium, Rubidium, Caesium and Francium. Although on some periodic tables hydrogen …

Esters – How are They Made and What are They Used For?

Firstly, let’s get across what actually is an ester. An ester basically chemicals with pleasant smells. For this reason, they are used as solvents and in perfumes. They are made by reacting alcohol with an organic acid. In the reaction sometimes sulphuric acid is used as a catalyst to speed up the reaction. …

Properties and Functions of Transition Metals

A transition metal is any element within blocks 3-12 of the periodic table therefore such example of an transition metal include copper, iron, gold and silver. They are generally hard and dense and less reactive than alkali metals. An example is gold which hardly reacts with anything. They …

Cracking Molecules and Plastics – Chemistry GCSE

Cracking is the term when a long unuseful molecule like bitumen are broken down into short more useful molecules like petrol. In cracking you always make and alkene and an alkaneThermal CrackingThis is where we use heat to crack a molecule. This is how most cracking is done. PlasticsPlastics are very large molecules. …

Saturated vs Unsaturated – Alkenes and Alkanes – Fats and Oils

The test for Alkanes and Alkenes is Bromine water: Alkanes have single bonds makes the already yellow bromine water stay yellow. In comparison… Alkenes have double bonds and make the yellow bromine water turn colourless (don’t say see-through) Fats and OilsThe more viscous a substance is, the more …

Covalent Bonding Structure In Atoms – What Is A Covalent Bond?

Covalent bonds are bonds where electrons are shared between atoms to make a full outer shell of electrons on each atom. A good example of a covalent bond is H20 or water. Hydrogen has only 1 electron and as the electrons configuration goes 2,8,8,2, hydrogen needs an electron to fill its outer …