Across
- 3. Atomic particles found in the nucleus of an atom and carry a positive charge
- 7. a group of atoms bonded together
- 8. properties characteristic of no more than two electrons
- 9. Atomic particles that move around the nucleus of an atom and carry a negative charge
- 10. of Conservation of Mass mass in an isolated system is neither created or destroyed by chemical reaction or physical transformation.
- 12. the number of protons in the nucleus of an atom
- 14. He formulated the Periodic Law
- 15. brittle,not malleable or ductile,poor conductors of heat and electricity
- 17. (on the P.T.) the horizontal lines on the periodic table
- 19. Gas any of the most gaseous elements like helium,neon,krypton
- 20. the central and most important part of an object
Down
- 1. are the ingredients produced AFTER the reaction takes place
- 2. is a substance formed when two or more chemical elements are chemically bonded together.
- 4. (on the P.T.) columns on the periodic table
- 5. that is associated with an atom
- 6. Atomic particles found in the nucleus of atoms and carry NO electrical charge
- 11. an extremely small amount of a thing or quality
- 12. the mass of an atom of a chemical element expressed in atomic mass units
- 13. Shares characteristics of both nonmetals and metals
- 16. atoms having the same number of protons
- 18. solid,shiny, good conductors of heat and electricity, ductile, and malleable
- 21. abbreviation or the element