An atom in an excited state has an electron configuration of 2-7-2. explain in terms of subatomic particles, why the excited atom described is electrically neutral.

Number of electrons: 11

Number of protons: 11

Number of neutrons : not enough information.

Explanation:

an atom contains sub atomic particles electrons, protons and neutrons.

Electrons are present in the outer shells.

The given atom contains eleven electrons.

The atom is neutral so the number of electrons will be equal to number of protons. The number of protons will be 11.

The number of neutrons will depend upon the type of isotope.

c. 75.7

i think that is the right