Periodic Trends

1. Groups of elements have similar physical and chemical properties because they have the same number of _______ electrons.
3. Group is also known as the ____________.
6. Type of element that conducts electricity, is malleable & ductile
7. Term referring to the Vertical Columns of the Periodic Table
9. Name of the only element touching the "Periodic Table" staircase that is not a metalloid.
11. The most reactive nonmetal on the Periodic Table is __________.
12. The element with an atomic number of 74.
13. Term referring to the Horizontal Rows of the Periodic Table

2. Group 18 is known as the ________ Gases.
3. Name of an element that acts like a nonmetal under Earthly conditions, but acts like a metal in space.
4. Type of element on the right side of the Periodic Table
5. The most reactive nonmetal on the Periodic Table is _________.
8. The Periodic Table is organized in order of atomic ________.
10. Type of element found running down both sides of the staircase (bolded line) of Periodic Table, tend to have properties of both metals and nonmetals