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An Element Has Atomic Number 13 and an Atomic Mass of 27. (A) How Many Electrons Are There in Each Atom of the Element ? (B) How Are These Electrons Distributed in the Various Energy Levels ? - Science

Short Note

An element has atomic number 13 and an atomic mass of 27.
(a) How many electrons are there in each atom of the element ?
(b) How are these electrons distributed in the various energy levels ?

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(a) The atomic number of given element is 13 which is defined by the number of protons in an atom. Thus, there are 13 e-(s) in each atom of the given element  because in a neutral atom, number of protons is equal to the number of electrons.
(b) Electronic configuration of given element (2,8,3)  is
 K = 2; L = 8; M = 3

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Lakhmir Singh Class 9 Chemistry - Science Part 2
Chapter 4 Structure of the Atom
Short Answer Type Questions | Q 44 | Page 193
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