Topic C1:Paticles; Flash Questions 0.0 / 5 ? ChemistryParticlesGCSEOCR Created by: MiriamLCreated on: 31-03-20 12:27 What are the signs of a chemical change? (3) Fizzing, heat change, colour change 1 of 10 How is the partile model limited by size? It doesn't show how small the particles really are (10^-10) 2 of 10 How is the particle model limited by space? Doesn't represent the space between particles e.g gap between helium particles is 55 times biger than the particles themselves 3 of 10 How is the particle model limited by forces? Doesn't show forces around particles. (solid strongest; gas weakest) 4 of 10 In an atom what do protons and electrons have in common? Same amount 5 of 10 What is the mass number Protons plus neutrons 6 of 10 How can you tell which is the mass number Biggest, usually at the top 7 of 10 What is the smaller number/ number on bottom Protons 8 of 10 From the periodic table how can you work out how many neutrons in an atom? Mass number minus proton number 9 of 10 What are ions compared to atoms? Charged, atoms have no charge 10 of 10
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