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