Across
- 2. negatively charged particles
- 3. atomic mass unit
- 6. these tend to be brittle lack luster and not good conductors of electricity
- 10. the process by which unstable atoms become more stable
- 11. the number of protons in an element
- 13. very stable colorless and odorless
- 15. horizontal rows on the periodic table that read left to right and one protons and electron is added from one element to the next
- 18. good conductors of heat and electricity they are malleable and shiny
- 19. rare earth metals
- 21. An element with a different number of electrons with the same amount of protons
- 22. these tend to be lustrous, ductile, malleable, and good conductors of electricity
- 23. positively charged particles
- 25. vertical columns on the periodic table that share the same properties
Down
- 1. uncharged or neutral particles
- 4. properties of metals and nonmetals
- 5. An element with a different number of neutrons with the same amount of protons
- 7. electrons that could be surrounding the nucleus
- 8. reactive with group 7 but not a much as alkali metals
- 9. reactive with groups 1 and 2 and common anti-bacterial
- 12. when an atom gains an electron
- 14. very reactive with group 7
- 16. when an atom loses an electron
- 17. particles the that are given off when atoms break apart
- 20. all are radioactive
- 24. found in the center of the atom and contains protons and neutrons