Across
- 3. Dimitri Mendeleev is known of the father of this table.
- 4. A clear colorless gas that every living organisms NEEDS.
- 8. JJ Thompshon invented the ________ ray tube to help discover the electron.
- 9. The positive center of the atom.
- 11. Known element used as a "war gas" that maimed thousands of soldiers.
- 13. This was a model proposed by JJ Thompson that was disproved by his student Rutherford.
- 14. This is the positive charged particle.
- 15. This element is what your graphite pencils and diamond rings have in common.
- 17. Elements can combine to form these.
- 18. composed of the same type of atoms and there are 118 of them as of 2024
Down
- 1. Today's man balloons (blimps) use this unreactive gas.
- 2. Democritus called these small, indivisible particles.
- 5. The negatively charged particle of an atom.
- 6. This Yellow, handsome looking lump of non-metal does not conduct electricity.
- 7. This scientist used Gold foil to disprove the plum pudding model.
- 10. This scientist discovered the electron (last name).
- 12. This element is a Flammable gas that caught the Hindenberg (man balloon) on fire.
- 14. Niels Bohr proposed the model of an atom in which electron orbit the nucleus.
- 16. Atoms are mostly empty __________.