Model 4 shows 4 electrons in the outer shell of the atom. Option D is correct.
What is an atom?
The atom consists of matter that may be split without releasing electrical charges.
It's also the smallest unit of matter with chemical element features. As a result, the atom is the fundamental unit of science.
In the nucleus, proton and the neutron is existing. The condition of the atom to be electrically neutral is that the number of the proton and electron should be the same.
The outermost shell, is the shell containing electrons in which limited number of the electron can be existed. When an atom's outermost electron shell is full, it is the most stable and least reactive.
Model 4 shows 4 electrons in the outer shell of the atom. It is simply obtained by calculating the no electron in the shell.
Hence, option D is correct.
To learn more about the atom, refer to the link;
brainly.com/question/1566330
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