Atoms in column 7 of the Periodic Table have 7 electrons in their outer shell.
Atoms are most stable when they have 8 electrons in their outer shell.
So atoms of elements in column 7 have a strong attraction for 1 electron.
Flourine being the smallest atom in that column has the strongest attraction for 1 electron.
Ionic
There are two types of charges of ions that are the negative and the positive charges. Ionic bonding is between 2 types of elements;the metals and non-metals. Metals loose electrons while non-metals gain electrons. when they form ions they obtain charges. The metals always gain a positive charge as they loose electrons while the non-metals always gain a negative charge as they gain electrons.
Se will gain electrons
Electrons always have their charge, when atoms gain electrons, they become ions.
Nonmetals gain electrons in chemical reactions.
It needs to lose, or gain, electrons.
Metals lose electrons, nonmetals gain electrons.
The two types of ions are cations and anions. Cations are formed when atoms lose electrons, resulting in a positively charged ion, while anions are formed when atoms gain electrons, resulting in a negatively charged ion.
it should gain 3 electrons
Phosphorus wants to gain three electrons to have 8 valence electrons.
Sulfur must gain two electrons.
If you mean Metals... No, they do not gain electrons, they actually lose electrons because it is a lot easy for them to lose them so they can gain stability much faster.