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Atomic Crossword Name: ______________________________ Period: ____ Across 2. "Aech too oh" 4. The smallest element 7. Particle with no charge 8. Greek thinker who first coined the term "atomos" 11. A _____________ electron is in the outermost shell of an atom 12. Formed when atoms share electrons 14. Has a different number of neutrons than normal 15. The splitting of an atomic nucleus (usually with heavy elements) 17. British scientist who formulated our modern atomic theory 22. The merging of two atomic nuclei (usually with light elements) 24. Negatively-charged particle 25. The same as the number of protons 29. An atom that has too many or too few electrons 30. A positively charged atom 31. The "nonexistent" rings that hold electrons 32. C, Fe, Au are all examples of this Down 1. "...I wonder what happens if I shoot alpha particles at a piece of gold..." 3. Two neutrons and two protons 5. Smallest piece of matter that still retains the properties of an element 6. Came up with the orbital model of atoms 9. "Plum pudding model" scientist 10. A man just full of "uncertainty" 13. This element makes up most of the atmosphere 16. We need this gas to keep living (even though it burns!) 18. The average weight of an element 19. The study of things that are very small 20. A negatively charged atom 21. Where you find most of the mass of the atom 23. This element makes 4 bonds and is very important for our bodies 26. A type of element that doesn't like to form bonds 27. Two or more atoms bonded together 28. Positively-charged particle Word List: Proton Neutron Electron Nucleus Orbital Atomicnumber Atomicmass Atomicsymbol Hydrogen Ion Anion Cation Valence Noblegas Isotope Fission Fusion Bond Water Nitrogen Oxygen Carbon Atom Molecule Democritus Dalton Thomson Rutherford Bohr Heisenberg Quantummechanics Alphaparticle