An Atom of an Element Contains 29 Electrons and 35 Neutrons. Deduce (I) the Number of Protons and (Ii) the Electronic Configuration of the Element. - Chemistry

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Numerical

An atom of an element contains 29 electrons and 35 neutrons. Deduce (i) the number of protons and (ii) the electronic configuration of the element.

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Solution

An atom consists of protons, electrons & neutrons. A positive atom will contain a higher number of a proton(H+), a negative atom will have a higher number of electrons(e-) & a neutral atom will contain the same number of protons & electrons. Therefore, 

(i) For an atom to be neutral, the number of protons is equal to the number of electrons.

∴ Number of protons in the atom of the given element = 29

(ii) The electronic configuration of the atom is

1s2 2s2 2p6 3s2 3p6 4s1 3d10.

Hence, it is the electronic configuration of copper.

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Chapter 2: Structure of Atom - EXERCISES [Page 70]

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NCERT Chemistry Part 1 and 2 Class 11
Chapter 2 Structure of Atom
EXERCISES | Q 2.26 | Page 70

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