Record your answers on the answer sheet provided by your teacher or on a sheet of paper.
9. Based on the information found in the periodic table, compare and contrast properties of the elements gold and silver.
Record your answers on a sheet of paper.
16. What role does nitrogen play in the human body? Explain the importance of bacteria in the soil which change the form in which nitrogen naturally occurs.
10. Why don’t the element symbols always match the name? Give two examples and describe the origin of each symbol.
17. Much of the wiring in houses is made from copper. What properties of copper make it ideal for this purpose?
Boiling point (C)
Use the graph below to answer questions 11 and 12.
Boiling Points of Period 1, 2, and 3 Elements
4500 3500 2500 1500 500
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 H He Li Be B C N O F NeNaMg Al Si P S Cl Ar
Atomic number / Element
The data shows that boiling point is a periodic property. Explain what the term periodic property means.
Describe patterns evident in this data.
Describe the mixture used by dentists for the past 150 years to fill cavities in decayed teeth. Why do many dentists today use other materials to repair teeth?
Compare and contrast the periodic table that Mendeleev developed to the periodic table that Mosley organized.
Choose a representative element group and list the elements in that group. Then list three to four uses for those elements.
18. Why do some homeowners check for the presence of the noble gas radon in their homes?
Use the graph below to answer questions 19 and 20. Elements in the Human Body
70 60 50 40 30 20 10 0
Carbon Hydrogen Calcium Element
The graph above shows elements present in the greatest amounts in the human body. Use information from the periodic table to create a chart which shows prop- erties of each element, including its sym- bol, atomic number, the group to which it belongs, and whether it is a metal, non- metal, or metalloid.
One element shown here is an alkaline earth metal. Compare the properties of the elements in this family to those of the elements found in Group 1.