10. Periodic Properties of the Elements

Of the elements listed in the choices, which would be expected to have the most metallic character?

Little is known about the properties of astatine, At, because of its rarity and high radioactivity. Nevertheless, it is possible for us to make many predictions about its properties. (b) Would you expect At to be a metal, nonmetal, or metalloid? Explain.

Choose the more metallic element from each pair. c. Cl or O

Choose the more metallic element from each pair. a. Sb or Pb b. K or Ge c. Ge or Sb d. As or Sn

Arrange these elements in order of increasing metallic character: Fr, Sb, In, S, Ba, Se.

Arrange these elements in order of decreasing metallic character: Sr, N, Si, P, Ga, Al.

Consider the elements: Na, Mg, Al, Si, P. c. Which element is least metallic?

Neither strontium (Sr) nor antimony (Sb) is shown in the activity series of Table 4.5. Based on their positions in the periodic table, which would you expect to be the better reducing agent? Will the following reaction occur? Explain.

Between which two elements is the difference in metallic character the greatest?

The list that correctly indicates the order of metallic character is

Of the elements below is the most metallic