C4 0.0 / 5 ? ChemistryC4GCSEOCR Created by: mazzamarmarCreated on: 17-05-16 12:20 37108926415 Across 1. The tiny central part of an atom made of protons and neutrons. Most of the mass of an atom is concentrated in its nucleus (7) 4. A charged particle (atom or molecule) (4) 5. A pure substance made of one type of atom (7) 6. An uncharged particle found in the nucleus of an atom (7) 7. A description of the way a property increases/decreases along a series of elements/compounds (5) 10. A region of space around a nucleus of an atom, where there can be electrons (5) Down 2. A group of atoms joined together (8) 3. The number of protons in the nucleus of an atom (6, 6) 8. Tiny particles in atoms found outside the nucleus. They have negligible mass and a negative charge (8) 9. The smallest particle of an element (4)
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