The correct statement is:
Metals can be hammered into thin sheets, and nonmetals are brittle.
This statement accurately describes the physical properties of metals and nonmetals. Metals are malleable, meaning they can be shaped or hammered into thin sheets, while nonmetals tend to be brittle and are not malleable.
The other statements are incorrect:
- The first statement is misleading because while metals and nonmetals can be found in various groups, they are primarily categorized by specific areas in the periodic table (metals on the left and center, nonmetals on the right).
- The second statement is incorrect; while most metals are solids, most nonmetals are gases at room temperature, with bromine being a notable exception as a liquid.
- The fourth statement is false as well; metals are generally good conductors of electricity, whereas nonmetals are typically poor conductors.