chemistry
Across
- 3. the most reactive metal
- 4. brittle, semi conductive, able to be cut with a knife
- 6. what mendeleev used to organize the periodic table
- 8. alkali metal with lowest atomic number
- 9. an atom with a net negative or positive charge due to gaining or losing one or more electrons
- 13. all are radioactive
- 16. when valence electrons move from one atom to another permanantly
- 17. the most reactive nonmetal
- 18. last name of the scientist that made the periodic table
- 19. illustration to show valence electrons on paper
- 20. known for being malleable, highly conductive
- 21. the top-left most part of the staircase
- 25. alkaline earth metal that is commonly found in cows milk
- 26. the electrons that exist in the outermost shell of the atom
- 28. noble gas with lowest atomic number
Down
- 1. will not bond with other atoms
- 2. metals that are not found alone in nature
- 5. highly reactive element with an atomic number of three
- 6. negatively charged ion
- 7. transition metal with an atomic number of seventy six
- 8. called the high earth metals
- 10. positively charged ion
- 11. person who modernized the periodic table
- 12. largest group in the period table
- 14. metal known for its orange color and high conductivity, known for commonly being used in wires
- 15. naturally gaseous, brittle in solid form
- 22. bonds with chlorine to make salt
- 23. only lanthanide that is completely radioactive
- 24. actinide with the highest atomic mass
- 27. nonmetal with an atomic number of eight