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 Edexcel unit 7 notes area available for download as well as online version available for reading. To download file, click here. Unit 7 : Radioactivity.(part 1) 7.1 Atomic structure The atom consists of nucleus located in the centre which is made up of the protons and neutrons. Protons: Positively charged particle. Have same mass of neutron. Neutrons: Neutral charge and mass is same as proton. Electrons: Circulating around the nucleus of an atoms, have a negative charge. An atom is electrically neutral as it has equal number of protons and electrons and positive charges cancels out the negative charges. Ions: There can be a positive ion or negative ion; if electron is taken away from an atom it becomes positively charged as the number of protons in that particular atom is more than the electrons A negatively charged ion will have a greater number of electrons than protons. Ions are found in pairs as a charged particle will attract another ion with opposite charges and will b...

 Classified past paper of Unit 6: Magnetism and electromagnets  EDEXCEL IGCSE past papers for code 4PH1/4PH0. The paper has question from paper 1 and 2 from higher tier. UNIT 6: Magnetism and electromagnets classified past papers link for download is given below: Download past paper here. Marking scheme is available for free download just comment and get Marking scheme emailed to your inbox within 24-48 hours. Notes can be found on this link in PDF format.  Visit notes  page Here Notes Excerpt for unit 6: Split-ring commutator: continuously rotates with coil between the carbon brush contacts placed between the poles of magnet. This happens because he direction of coil in current is reversed, so there are continuous forces acting on coil to keep it turning. The steps of commutator working are: a)   Current flowing through the commutator causes side A to move upward and side B to move downwards. b)   ...

 Unit 6: Magnetism and Electromagnetism. You can download your copy of notes here. UNIT 6: Magnetism and Electromagnetism When a bar of magnet is hung from a thin thread and allowed to swing, it stops swinging and the pole of magnet facing the north side is known as the north pole and south-seeking pole is known as south pole. Metals such as iron, cobalt and nickel are magnetic which means a magnet will attract this metal. For example, if there are iron pins fallen then can be quickly collected with the help of a magnet. Two like pole (N and N pole, S and S Pole) will repel each other. But unlike poles will attract each other. Practical 1: Magnetic Fields  Method 1: a) Place a compass on a piece of paper, with pencil plot a dot on the north side of compass needle. b) Shift the compass to next position in contact with the dot and mark the position of second needle. c) Repeating the process so that a field line is traced from the north to the south pole in magnet with a...

Classified past paper of Unit 5: Solids, Liquids and gases. EDEXCEL IGCSE past papers for code 4PH1/4PH0. The paper has question from paper 1 and 2 from higher tier. UNIT 5: Solids, Liquids and gases, classified past papers link for download is given below: Download past paper here. Marking scheme is available for free download just comment and get Marking scheme emailed to your inbox within 24-48 hours. Notes can be found on this link in PDF format. Visit notes page Here Mainly covering: Density: Concept and formula related questions,Develop relationship between Density, volume and mass using formula (Density= Mass/Volume). Experimental questions related to density measurements of regular and irregular solids. Understand different equipment needed ; Electronic balance,vernier calipher and test-tube filled with water-(for measuring volume of irregular solids),If there is more information needed on this topic,Feel free to visit the notes page to understand more detailed experiments....