Topic 1 Key Terms 0.0 / 5 ? PhysicsMatterGCSEOCR Created by: 14moorejohnCreated on: 05-10-18 18:23 7231649810 Across 1. When the particles at the surface of a liquid has enough energy to become a gas vapour (9) 4. A positive particle found in the nucleus (6) 8. The centre of an atom that contains the protons and neutrons (7) 9. Measure of the amount of substance per unit volume (7) 10. Any particle found in the nucleus (7) Down 1. The basic building block of an element (8) 2. Atom of an element containing same number of protons but different number of neutrons (7) 3. Total number of neutrons and protons in the nucleus of an atom (4, 6) 6. When a gas turns into a liquid (8) 7. Change of state when a solid becomes a gas without going through the liquid state (9)
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