Fundamental ideas (1) 0.0 / 5 ? ChemistryFundamental ideasIGCSEAQA Created by: becky.65Created on: 12-12-15 11:28 If a solid is heated and changes directly into a gas without melting, what is this change of state called? Sublimation 1 of 5 When a solid reaches its melting point, what is happening to the energy we are providing? It is being absorbed to break the forces between the particles in the solid 2 of 5 What are atoms made of? Protons, neutrons and electrons 3 of 5 What is the atomic number equal to? The number of protons (and the number of electrons as there is an equal number of protons and electrons) 4 of 5 What is the mass number equal to? The number of the protons + neutrons 5 of 5
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