What are the electrons called in the lectrons called in the outermost energy level of an atom? why are they important (10) (b) two

This outermost shell is known as the valence shell, and the electrons found in it are called valence electrons.

Explanation:

They are important to an atom because the fewer valence electrons that the atom holds, the less stable it becomes.

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

the answer to your question is c