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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.

Respuesta :

Answer:

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.

batolisis

The excited atom can be described as electrically neutral because from its electron configuration ;

  • The number of electrons ( 11 ) = Number of protons ( 11 )

From the electron configuration 2-7-2 the number of electrons equals ( 2 + 7 + 2 ) = 11 electrons,  also the number of protons will be = 11 for the atom to be neutral. While the number of Neutron is not significant in the positivity or negativity of atoms.

The subatomic particles contained in an atom are protons, neutrons and electrons ( which are present in the outer most shell ) and represents the electron configuration of an atom. while the number of neutrons is determined by the Isotope.

Hence we can conclude that The excited atom can be described as electrically neutral because from its electron configuration ; The number of electrons = Number of protons .

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