Across
- 2. The atomic __ of an element = the # of protons
- 4. Atoms with the same # protons but not neutrons
- 7. Electrons Electrons on the outer energy levels of an atom
- 8. Atoms with an unequal # of electrons and protons
- 9. ___ share metal and nonmetal properties
- 11. The mass of the atom is in here
- 13. Matter is classified in ___ and compounds
- 16. Matter is classified in___, or elements.
- 18. The (-) charge substomic particle
- 19. Horizontal rows on a periodic table
- 22. Short for atomic mass unit
- 23. The only person to have an element named after them while living
- 24. Mass The weighted average mass of atomic masses from an atoms isotopes
- 26. Ions with a (-) charge
- 27. Earth Metals Made up of lanthanides and actinides
- 28. The vertical columns on the periodic table are groups
- 29. __ forms by losing electrons
Down
- 1. A ___ atom has an equal # of protons and electrons
- 3. The simplest form of a pure substance
- 5. Metals are great ___ of heat and electricity
- 6. Elements in the same family share similar __
- 10. ___ was the first to use the term atom instead of atomos
- 12. Mendeleev created the modern version
- 13. The father of the modern day periodic table
- 14. good heat/electricity conductors, shiny, etc.
- 15. Mixtures where one substance dissolves in another
- 17. __ ions form by gaining extra electrons
- 20. The atomic __ of Potassium is K
- 21. Gases __ __ are the least reactive family of the element
- 25. The (+) charge subatomic particles in nucleus