The electron configuration 1s2 2s22p6 3s23p6 represents which noble gas? neon argon helium krypton

Argon

Explanation:-

Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom.

The electrons are filled according to Afbau's rule in order of increasing energies and thus the electronic configuration

Total number of electrons = 2+2+6+2+6 = 18

The element which has 18 electrons in its ground state is argon.

Neon has 10 electrons.

Helium has 2 electrons.

Krypton has 36 electrons.

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a  solution  is always transparent, light passes through with no scattering from solute particles which are molecule in size. the  solution  is homogeneous and does not settle out. a colloid is intermediate between asolution  and a  suspension. while asuspension  will separate out a colloid will not.