Considering the structure of the atom, the correct answer is option a. electrons only are arranged in various energy levels or orbitals.
All atoms are made up of subatomic particles: protons and neutrons, which are part of their nucleus, and electrons, which revolve around them. Protons are positively charged, neutrons are neutrally charged, and electrons are negatively charged (electrons).
The electronic configuration of elements is the arrangement of all the electrons of an element in energy levels and sublevels (orbitals).
There are 7 energy levels, numbered from 1 to 7, and in which the electrons are distributed, logically, in order according to their energy level. Electrons with less energy will spin at level 1.
Summary
The correct answer is option a. electrons only are arranged in various energy levels or orbitals.
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