The lower the atomic number the more the chance of it being likely. It depends. Are you talking about a stable element or an ion? An ion is gonna have more electrons, and will transcend further orbitals.
If all the electron orbitals are filled then the atom is inert. It will not chemically react with anything. If an atom has empty spaces in the outer orbit, it will react with other elements. Electrons from other elements can share positions in the outer orbits.
There are more than two such atoms. Perhaps there was a list of atoms you had to chose from. Anyway, two such atoms are beryllium and magnesium.
A completley filled out electron level makes the atom stable
Helium atoms only need 2 valence electrons to have a filled outermost energy level because helium is in the first period of the periodic table and its outermost energy level can only hold a maximum of 2 electrons.
Those in group VI such as O, S, Se, Te, Po Lv.
If all the electron orbitals are filled then the atom is inert. It will not chemically react with anything. If an atom has empty spaces in the outer orbit, it will react with other elements. Electrons from other elements can share positions in the outer orbits.
the one that is completely filled
Because the tube is partly filled with coloured spirit or alcohol so the air bubble is more visible.
Helium (He) and Neon (Ne) will both have their outer energy level filled with 2 electrons.
Helium.
There are more than two such atoms. Perhaps there was a list of atoms you had to chose from. Anyway, two such atoms are beryllium and magnesium.
undiscovered...yet, but there are a few...go forward 50 years and see
An atom with an incompletely filled outermost energy level is likely to be reactive. This is because atoms tend to gain, lose, or share electrons to achieve a stable outer electron configuration. Atoms with incomplete outermost energy levels are looking to fill or empty their outermost energy level to achieve stability.
A completley filled out electron level makes the atom stable
Helium atoms only need 2 valence electrons to have a filled outermost energy level because helium is in the first period of the periodic table and its outermost energy level can only hold a maximum of 2 electrons.
In the element krypton, the third energy level has 3 sublevels: s, p, and d. The s and p sublevels are filled first before the d sublevel. This means that in krypton, the 4s and 4p sublevels are filled, while the 4d sublevel remains empty.
Those in group VI such as O, S, Se, Te, Po Lv.