By the first principle energy level I assume you are referring to the lowest atomic orbital or ta principal quantum number of 1. This orbital holds 1 pair of 2 electrons.
Oxygen has 2 electrons in its first energy level.
2
The first energy level contains one s orbital, which can hold up to two electrons.
Potassium has four(4) energy levels.
There are 2 energy levels in a Carbon atom. The first energy level consists of '1s' orbital, and the second energy level consists of the '2s' orbital and the '2p' orbital.
Two electrons can be housed in the first energy level.
Zinc has 2 electrons on its first energy level.
Helium has 2 electrons in its first energy level.
there are two electrons in the first energy level of every element except for hydrogen which only has one electron in the first energy level.
The first energy level can hold up to 2 electrons.
The first energy level can take a maximum of two electrons.
Two electrons can be housed in the first energy level.
2
2
Oxygen has 2 electrons in its first energy level.
Lithium has a total of 3 electrons. The first energy level of an atom can hold a maximum of 2 electrons, so the first energy level of lithium will have 2 electrons.
carbon has 2 electrons in its first energy level and 4 in its secound energy level because carbons atomic number is 6. 4+2=6.