Atoms timeline 0.0 / 5 ? ChemistryAtomsASOCR Created by: Amira200Created on: 13-03-16 11:27 493261758 Across 1. They make up the mass of the atom (7, 8) 5. Its charge is 0 and its mass is 1 (8) 6. Its mass is 1 and its charge is +1 (7) 8. The number of protons and neutrons in the nucleus (4, 6) 9. The weighted mean mass of atoms in an element when compared to 1/12 the mass of a C12 atom (8, 6, 4) Down 2. Its mass is 1/2000 and its charge is -1 (9) 3. The number of protons in the nucleus (6, 6) 4. The mean mass of isotopes when compared to 1/12 mass of a C12 atom (8, 8, 4) 7. Atoms of an element with different number of neutrons and mass but same number of protons and electrons (7)
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