The Periodic Table

2. Elements at the bottom of the periodic table are often referred to as ________ meaning they decay over time and are unstable
4. The periodic table has _________ families total
6. This element is found in the 13th family and the 4th period on the periodic table
14. This is the most reactive metal group on the periodic table
17. Iron has _______ electron orbits (rings)
18. The Atomic symbols were developed by ___________
20. The periodic table has ________ periods total
21. This is the smallest element consisting of one proton and one electron
22. The ancient Greeks originally believed that there were ________ fundamental elements
23. The majority (80%) of the periodic table is made up of elements classified as _______________
24. The horizontal rows on the periodic table
25. One characteristic of Post-Transition Metals is that they are _____ meaning they break easily
26. W is the Atomic symbol for this element after its original German name "Wolfram"

1. This element is found in the 17th family and the 2nd period
3. This group is the largest on the periodic table and are the most basic metals found on the periodic table
5. This element is an Alkaline-Earth Metal with 7 electron orbits (rings)
7. The center of the atom
8. The Atomic number of an element tells us how many _________ it has
9. This element's latin name was "Aurum" meaning "shining dawn," so its atomic symbol is Au
10. Electrons located in the outermost orbit furthest from the nucleus
11. This scientist made the first list of 33 elements
12. This scientist arranged the periodic table according to the elements' atomic number
13. The vertical columns on the periodic table
15. This group is often referred to as the rare earth metals
16. This scientist arranged the periodic table according to the elements' atomic masses and left blanks where new elements could be discovered
19. This scientist arranged the periodic table in groups of 8 by atomic mass