Solids in which electrons are able to move easily from one atom to another are: a) conductors b) electrically charged c) capacitors d) insulators

a) Conductors.

Explanation:

Conductors are solids that have free electrons. Some of the examples of solids that are conductors are Steel, Iron, Silver, Copper etc. How best a metallic solid can conduct depends on the number of conduction electrons present in it. These electrons are called conduction electrons.

Not all solids are conductors. For example, wood is a solid, but it is not a conductor. It is an insulator.

Insulators are those materials that do not have free electrons.

Semiconductors are the materials that behave as conductors under certain conditions

Option a) conductors

Explanation:

Conductors are the solids which allows the movement of electrons from atom to atom.

In conductors, electrons are free to move in the conductor's vicinity thus these free electrons contributes to the electrical conductivity of the conductor. A body is said to be electrically charged when the electrons in the atoms of the body are not evenly shared. Capacitors are the elements for the storage of electric charge. Insulators are the materials with no free electrons and have a high energy gap which do not allow the conduction of electricity.