Question

Sodium, Aluminium, Beryllium, Calcium, Iron etc are all metallic elements. Which of the following are their characteristics?

• A. Good conductors of heat and electricity
• B. Electropositive in nature
• C. Malleable, that is can be beaten into thin sheets
• D. Solid at room temperature

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A Good conductors of heat and electricity
B Malleable, that is can be beaten into thin sheets
C Electropositive in nature
D Solid at room temperature

Metallic elements are solid at room temperature and they possess metallic lusture or shine. Metals can be beaten into thin sheets, that is they are malleable and ductile too, which means they can be stretched into thin wires without losing the toughness.
Metals are electropositive in nature, that is they can easily give away electrons to become positive ions in nature.
Metals are good conductor of electricity because their atoms contain at least one free electron in it. Metals are also good conductor of heat because in a metal the lattice is closely packed together and the free electron in metal can easily bring kinetic energy through the lattice.
Some other examples of metals are- Cobalt, Nickel, Copper, Tin, Gold, Silver etc.