Question

structure of an atom

Answer 1

in centre there is a nucleus

Answer 2

In the centre there is a nucleus with neutrons and protons present in it. And the electrons are present around the nucleus in different shells. The first shell can contain maximum 2 electrons, second shell can contain 8 while the third shell can contain 18 shells. To calculate the maximum number of electrons a shell can contain
${2n}^{2}$
where n is the number of the shell
The Shells are named as K, L ,M ,N etc

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