A metalloid :)
The element is sulfur with 16 electrons. It gains two electrons to form sulfide ion which has 18 electrons as that of argon.
Nitrogen gains 3 electrons, oxygen gains 2 electrons, sulfur gains 2 electrons, and bromine gains 1 electron when forming ions.
Non-metallic elements typically gain electrons through ionic bonding. These elements have a tendency to gain electrons to achieve a stable octet configuration in their outermost shell. Examples include oxygen, sulfur, and chlorine.
The metal, which becomes a cation. The non-metal gains one or more electrons to form an anion.
Firstly I would like to correct you on your grammar. The question should in fact ask 'which' element gains 5 electrons. The question is also flawed form the start because more than one element gains 5 electrons. All elements in group 3 of the Periodic Table have 5 spaces in the outer shell. All elements want to feel complete, and the maximum amount of elements on the outer shell is 8. Therefore 3 + 5 = 8. So hey presto this is my answer to you. ~K :)
The same number of valence electrons as xenon.
Some elements become ions by gaining or losing electrons to achieve a stable electron configuration. When an element gains electrons, it becomes a negative ion (anion), while losing electrons results in a positive ion (cation). This process allows the element to achieve a full outer electron shell and become more stable.
If an element gains electrons, it has a negative oxidation number. The oxidation number is determined based on the number of electrons gained or lost by an atom in a compound. The rule is that in ionic compounds, the oxidation number of an element is equal to the charge it would have if it were an ion.
It depends on the element. For example, when iron loses electrons and formes iron-oxide, it is called rusting. With radioactive elements like uranium, it is called degrading, collapsing, or decomposing. A general word for this is reacting but this is a very bad word because it could mean gaining an element or something completely different. Further answer When it or loses or gains electrons it becomes charged - either positively or negatively. This not the same as decay, which happens to radioactive elements, and is caused by the nucleus breaking up and ejecting particles and becoming another element
going down a group, each element gains 1 shell (energy levels)
In the reduction process, electrons are typically used to reduce an element by gaining or accepting the electrons. The element being reduced gains electrons, thereby decreasing its oxidation state.
Oxygen gains 2 electrons to achieve a full valence shell with 8 electrons. This gives oxygen a stable electron configuration similar to the noble gas configuration.