PS 5

1. In 1875, a French chemist discovered a new element. He named this element ___ in honor of France.\
6. The most abundant metal in Earth's crust is called?
8. The pattern of repeating properties is called?
12. Silicon is considered to be a ___?
13. This is found in foods and in water, which accounts for more than 60% of body mass.
15. Until 1750, scientists had identified only 17 __.
17. Elements that are classified as solids, liquids, or gases are located in which class of elements?
18. The most abundant element in Earth's crust is called?

1. Each column on the periodic table is called a ___ ?
2. Mendeleev placed ___ in Group VII because this and Chlorine have similar properties.
3. Fresh ___ is a good source of iodine.
4. Brazil nuts are a good source of ____, as are fruits & vegetables.
5. An electron that is in the highest occupied energy level of an atom is called?
6. Only metals react with ___?
7. In order to place elements with similar properties in the same column, Mendeleev needed to leave spaces for ____ elements.
9. Mendeleev used a deck of ___ to create a pattern for the periodic table.
10. Aluminum & magnesium is considered as a ___?
11. Sulfur is considered to be a ____?
14. An Alkali metal has ___ valence electron(s).
16. This is the second most common element in the human body.