Well i think that will be boron according to the first 20 elements.
5 protons and 5 electrons
The element with 5 fewer electrons than sodium is not a gaseous element!
Bismuth (Bi) has 5 valence electrons.
Antimony (Sb, # 51) has 5 valence electrons (and so do all the other elements in that group.)
Boron has 3 valence electrons.Boron has 3 valence electrons.
The chemical element with the atomic number 51 is Antimony (Sb). Antimony is a Metalloid in Group 15(5) of the Periodic Table. It has 51 electrons in 5 electron shells with 5 electrons in the outer shell.
5 valence electrons.
Its valency is 3 i.e. 8-5.The element is a non metal since it has 5 electrons in the outermost shell.Hence, it is very difficult for the element to loose 5 electrons and would be easier togain 3 electrons .Hence, the element gains 3 electrons and thus we consider its valencyto be 8- no. of valence electrons.
Boron is an atom or element, and it contains protons, electrons, and neutrons.
Carbon+
Vanadium (V) contains 5 electrons in its 3d orbitals.
Phosphorus has 5 valence electrons in the M shell.