Across
- 3. mass of atom, located at bottom of symbol box
- 5. atomic particles found in the nucleus, positive charge
- 8. a reaction that occurs in which a layer of metal is bonded to the surface of another substance, which is usually another metal
- 9. regions of space outside the nucleus of an atom
- 10. atoms in the outermost orbital
- 12. always contains the same number of electrons and protons
- 15. what we put in a chemical reaction, to get a reaction/what will react
- 18. atomic particles found in nucleus, neutral charge
- 20. mix of metals and nonmetals, partially conduct energy
- 22. horizontal row atomic numbers increase left to right #erd 1-7
- 23. created the periodic table of the elements
- 26. at least two atoms of different elements combined
Down
- 1. one to two letters representing an element
- 2. matter can be changed from one form to another, mass is constant
- 4. smallest unit of any form of matter
- 6. particle appears in nucleus of atom- exempt hydrogen, positive charge
- 7. substance that can't be chemically broken down
- 11. very good when conducting heat or energy
- 13. very poor conducting heat or energy, weak Compaired to metal
- 14. two or more atoms of any element combined
- 16. energy is taken in temperature feels cooler
- 17. columns of elements on the periodic table 18 columns
- 19. energy given off, feels warm
- 21. any of gaseous elements
- 24. atomic particles move around nucleus, negative charge.
- 25. what we get out of a chemical reaction