Across
- 1. a positive charge
- 2. on the periodic table, vertical column down
- 4. clump of protons and neutrons, in the middle of an atom
- 5. the smallest component of a chemical
- 8. a neutral charge
- 11. an isolated system is neither created nor destroyed by chemical reactions
- 15. brittle, not malleable, not a good conductor of electricity
- 16. circle of electrons around the nucleus (2,8,8,2)
- 17. mass of an element
- 18. the two letters to represent the element
- 20. substance made of 2+ different kinds of atoms
- 21. made the first periodic table
- 23. does not mix with other elements, neon & helium are examples
- 25. energy is absorbed, cool
Down
- 1. what comes out of a chemical reaction
- 3. a negative charge
- 6. good conductor of electricity, malleable
- 7. reaction when a layer of metal is bonded to another substance, typically another metal
- 9. on the periodic table, horizontal rows across
- 10. energy is released, heat
- 12. outer circle of of electrons
- 13. number of protons and neutrons in the nucleus
- 14. pure subastance, periodic table
- 19. mix between metal and non-metal
- 22. combination of atoms together
- 24. what you out into a chemical reaction