The electron cloud is explained and an atomic model has been explained below.
Different types of modelling has be done to illustrate the structure of atom , the latest is the electron cloud model ,
The electron cloud model is named so as the electrons in each orbital are shown as the fuzzy cloud around the nucleus , the denser the cloud the more is the probability of electrons to be found.
The image attached with the answer shows the Electron cloud model of Helium
Helium has 2 protons , 2 electrons and 2 neutrons
It can be seen from the image that the colour of the cloud is darker near the nucleus as the electrons are most present near it.
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