which is a characteristic of the part of the atom marked \a\?\no it contains most of the mass.\no it is…

which is a characteristic of the part of the atom marked \a\?\no it contains most of the mass.\no it is negatively charged.\no it is mostly empty space.\no it is composed of electrons.

which is a characteristic of the part of the atom marked \a\?\no it contains most of the mass.\no it is negatively charged.\no it is mostly empty space.\no it is composed of electrons.

Answer

Answer:

It is mostly empty space.

Brief Explanations:

The part marked "A" is the electron - cloud region of the atom. This region is mostly empty space with electrons moving in it. The nucleus (the part with protons and neutrons) contains most of the mass. Electrons are negatively charged and are in the electron - cloud but the region itself is not just composed of electrons and is not negatively charged as a whole.