Introduction ​Hydrogen is a flammable gas. It burns in air to produce water. A convenient test for hydrogen is to put a lighted splint in the mouth of a test tube full of the gas . The gas will burn with a characteristic squeaky pop if hydrogen is present. Hydrogen gas can be used as a fuel.  When hydrogen burns in air it combines with ox...

Transition metals form coloured compounds

OCREdexcelAQA Transition elements : properties  Ligands and complex ions Ligand substitution and precipitation Redox reactions  Electron configurations  The video here  uses the relevant section of the Royal Society of Chemistry's periodic table website to show the electron configurations of the first row of the transition ...

Carbon atoms have an electron configuration of 2,4

 1.19 Deducing electron configurations  Students should: 1.19 understand how to deduce the electronic configurations of the first 20 elements fromtheir positions in the Periodic Table A carbon atom has 6 protons and therefore 6 electrons. The electrons are arranged in two shells; 2 electrons in the first shell and 4 electrons in...