Those with a stable octet are referred to as noble gases. They are highly stable elements. For eg:- Helium, Neon and Argon. A few compounds of Xenon and Argon have been formed, but these are referred as Noble gases.
valence electrons are the electrons in the outermost energy level
Yes. Valence electrons are the electrons found in the outermost shell / energy level
Valence electrons are the electrons in the outermost energy level.
Helium only needs 2 valence electrons to have a filled outermost energy level.
Electrons in the outermost energy level are called valence electrons. The number of valence electrons on an atom largely determine its behavior and characteristics.
The question is somewhat vague. If the question were written as an atom contains seven electrons in the outermost energy level and that outermost shell is a p-shell then the atom is a halogen. If the atom contains seven electrons in the outermost energy level and that outermost shell is a d-shell or f-shell then the atom is a metal.
Outermost energy level is full if there are 8 electrons in the valence shell.
helium
valence electrons are the electrons in the outermost energy level
Carbon has four electrons in the outermost energy level, which is energy level two. It needs eight electrons to have this energy level filled.
Halogens have six valence electrons in the outermost energy level.
Noble gases (except for helium which has 2 valence electrons).
The total number of electrons in Phosphorus (P) is 15 (its atomic number). The first energy level contains 2, the second energy level contains 8, and the third energy level contains 5.
The chloride ion (Cl-) has 8 electrons on the outermost energy level.
2. the number of electrons on the outermost level is always equal to the group number. Barium is group 2 therefore it's outermost energy level contains 2 electrons
Carbon has four electrons in the outermost energy level, which is energy level two. It needs eight electrons to have this energy level filled.
The element is phosphorus and it contains 5 valence electrons.