Answer:
If an element has 10 electrons, 8 of them will be in the second energy level.
Explanation:
There are 7 energy levels, numbered from 1 to 7, and in which electrons are distributed, logically in order according to their energy level.
Each level is divided into sub-levels. These sub-levels into which each level is divided can be up to 4, which are called: s, p, d, f. In the sub-level s there can only be a maximum of 2 electrons, in p there can be a maximum of 6 electrons, in the sub-level d 10 electrons and finally in the sub-level f there can be a maximum of 14 electrons.
In level 1 there is only one sub-level, which will be the s. In level 2 there are 2 sub-levels, the s and the p. At level 3 there are 3 sub-levels s, p and d. And at level 4 there are 4 sub-levels, the s, the p, the d and the f.
Then, in level 1 there is only a maximum two electrons. In level 2 there are a maximum of 8 electrons. At level 3 there are a maximum of 18 electrons. And at level 4 there are a maximum of 32 electrons.
The filling of the orbitals occurs in increasing order of energy, that is, from the orbitals of lower energy to those of higher energy.
So, considering that at level 1 there can only be two electrons and that it is the lowest energy level, 2 of the 10 electrons that the element has will be located at that level. So 8 electrons remain to be located.
The next level to fill with electrons is 2. As this level can enter a maximum of 8 electrons, the electrons that remained to be located in level 1 will be located in level 2.
If an element has 10 electrons, 8 of them will be in the second energy level.
