Final answer:
Most metals are shiny and conduct electricity very well, due to the free movement of electrons and closely packed nuclei. They are used in jewelry, electrical wires, and for their heat conductivity. The correct answer is 'D) Both A and B' because metals are generally shiny and are excellent conductors of electricity.
Step-by-step explanation:
Most metals share several key characteristics, which define their position in the periodic table and their use in various applications. Answering to the student's question, options A and B are both correct. Therefore, the correct choice would be 'D) Both A and B.'
- Metals are generally shiny, which is referred to as having a metallic luster. This makes them suitable for applications like jewelry or decorative finishes.
- Electrical conductivity is another shared characteristic of metals, which is why they are commonly used in electrical wiring and components. This high conductivity is due to the free movement of electrons within their structure.
- Additionally, metals are good conductors of heat due to the close packing of their positive nuclei, which facilitates the easy transfer of heat.
- Most metals, with the notable exception of mercury, are also solid at room temperature and exhibit high melting points and densities due to their strong bonds and closely packed nuclei.
Metals are not typically known for forming alkaline solutions when mixed with water, which is why statement C doesn't share the common characteristics of most metals.