Across
- 2. two electrons and is associated with a region of a chemical bond
- 3. no electric charge
- 4. the smalles unit of an element
- 5. the material of chemical gas or metal that is on the periodic table
- 7. positively charged element
- 8. can form alloys with metals
- 11. energy is released
- 12. 18 numbers groups on the periodic table
- 13. the mass of the products in a chemical reaction must equal the mass of the reactants
- 17. energy is absorbed
- 18. to place farmers do what to crops every year
- 19. a group of atoms bonded together
- 21. changes during a reaction
- 22. consists of protons and electrons
- 23. the letters of an element (au)
Down
- 1. electrons participate in thr formation of a chemical bond
- 3. very brittle and cannot be made into wire
- 6. developed the periodic table
- 7. what you get after you mix things together
- 9. helium
- 10. contains the same amount of protons and electrons
- 14. their absorbency
- 15. composed of two or more separate elements
- 16. negatively charged
- 20. how the elements are arranged with increasing atomic numbers
- 24. sodium, alike metals has one electron