Periodic table

5. In the 1800s fewer than ______ elements were discovered
7. Found on the upper left side of the periodic table
8. Most elements are ______
9. Each element is represented by one ______
11. What makes the periodic table so invaluable is its useas a _____ tool
16. On a square above the chemical symbol is the ______
17. The ______ is the most powerful tool chemist have for organizing chemical information.
18. Below the symbol are the full name of the element and its _______
19. A one or two letter chemical ______

1. The elements in a gruop that have similar chemical______
2. A verticle column of elements is a _______
3. They have similar valence ______ configurations
4. Moseley reorganized the elements in the periodic table listing them in increasing order of _____ instead of atomic mass
6. ______ are found on the upper right of the periodic table
10. Most metals are found of the ______
12. Not good _____ of heat and electricity
13. You can predict a lot about the chemical ______
14. Each element has a unique atomic number . Thats the number of ______
15. Seven horizontal rows are called ______
16. Atoms are listed on the periodic table of increasing _____