Across
- 3. Used in chromatography to dissolve a compound.
- 6. Gas released when a group 1 metal reacts with water.
- 10. Filtration and ___ can be used to separate rock salt.
- 12. As you descend group 7 the elements become ___ reactive.
- 14. A vertical column in the periodic table.
- 15. Another name for group 0 gases.
- 17. Group 1 metals are very ___.
- 18. The charge of a nucleus.
- 20. Two or more elements bonded together.
- 21. Bromine will do this to iodine.
- 23. As you descend group 1, the reactivity ____.
- 25. The particles scattered from a gold nucleus in Rutherford's experiment.
- 27. The number of protons is the ___ number.
Down
- 1. American billionaire and owner of Wayne Enterprises.
- 2. The number of electrons is ___ to the number of protons in an atom.
- 3. When positive nuclear charge is blocked by electron shells.
- 4. The element with electron configuration 2,8.
- 5. Bohr concluded electrons were arranged in ___.
- 7. An atom is ___, unlike an ion.
- 8. This scientist showed the plum pudding model was wrong.
- 9. Effective mass of an electron.
- 11. Filtration separates ____ solids from liquids.
- 13. Same number of protons but different number of neutrons.
- 16. A red-brown halogen.
- 19. The number of electrons held in the first shell.
- 22. The element with electron configuration 2,8,8,2.
- 24. The number of electrons held in the second or third shell.
- 26. The modern periodic table is in order of ___ number.