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Global dimming occurs due to light being reflected off the Earth's atmosphere and back into space.Light is reflected off the Earth's atmosphere due to the build up of Soot (C).Soot (C) is a product of inc...

Lesson on organic synthesis ( Unit 4 OCR A )Step 1/ Slide 1: Teach (unless told that knowledge is known, tips and pointers still can be given). Step 2/ Slide 2: Worked example (if necessary)....

Graphite has a giant covalent structure where each carbon atom is covalently bonded to three other carbon atoms. Each carbon atom also has one delocalised electron which can flow freely through the struct...

Ionisation energies decrease going down group 1, firstly since the number of shells in the atom increases so the atomic radius is increased. There are also more electrons between the positively charged nu...

The number of electrons in the halogen atom increases as you move down the group (1st mark achieved here), causing stronger London forces to arise between the molecules of said halogen (2nd mark achieved ...