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Across 2. Force in the nucleus which causes 𝛽 decay 4. Decay particle from an unstable nuclei which contains 2 neutrons and 2 protons 5. In isotope notation, (_Z^A)X, X represents the __________ symbol of the element 6. Positively charged particle found in the nucleus 8. Word to describe each type of nucleus and is labelled using isotope notation 9. Atoms of the same element with the same number of protons but different number of neutrons 11. Force which holds together the protons and neutrons in the nucleus. 12. Word for proton or neutron in the nucleus 13. In isotope notation, (_Z^A)X, A represents the __________ (nucleon)number

Down 1. Electromagnetic radiation with very high energies emitted by an unstable nuclei. 3. Negatively charged particle with a mass 1/2000 that of a proton 4. In isotope notation, (_Z^A)X, Z represents the __________ (proton) number 7. Decay particle when an unstable nucleus emits a fast moving electron. 8. Neutrally charged particle with mass approximately the same as that of a proton 10. Postively charged centre of atom which contains most of its mass