An electron or electrons is/are lost or gained to produce an ion. An atom with the same number of electrons as protons is a neutral atom. If the proton count and electron count do not match, that atom is electrically "imbalanced" and is an ion.
It can be called oxidation (loss of electrons) or reduction (gain of electrons) if it occurs in a chemical reaction.
It can also be called ionization.
Electrons
Oxidation is loss of electrons and reduction is gain of electrons. In this case the Cl2 molecule is changed to two Cl- ions by gaining electrons, so the Cl2 is reduced. The Br in the NaBr salt is in the form of Br- ions. The Br- ions are changed to neutral Br atoms (a Br2 molecule) by losing electrons and so are oxidised.
we know that a atom needs 8 electrons in valance shell to or octet configuration ; duplet (2 electrons in outer most shell) , if an atom have atomic number 11 that is sodium and it can be written has 2,8,1 and it losses 1 electron to get duplet confg. as electrons are decreased they become positive ion or cations . anions are formed when number of electrons are increased by gaining electron to get given confg. ex: oxygen , atomic number 8 and written as 2,6 and it gains 2 electrons for octect confg.
For what?It requires a heat gain for the water,but a heat loss for whatever the water is in contact with.
Without knowing the specific circumstances of your question, it's not possible to be precise, but in general the electronegativity of an element is a big factor in determining its reactions.
Atoms gain electrons to form negatively charged anions. Atoms lose electrons to form positively charged cations.
Electrons
Ions. Cations have lost electrons and have a positive charge. Anions have gained electrons and have a negative charge.
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.
Atoms become ions by gaining or losing electrons to achieve a noble gas configuration of electrons, which is stable. Argon already has such a configuration and is very stable as it is. Any gain or loss of electrons would make it less stable.
Ionic and covalent bonding involve electrons. Ionic bonding involves the loss and gain of electrons, form ions. Covalent bonding involves the sharing of electrons.
The formation of chlorine from chloride ions invoves loss of electrons there fore it is "oxidation" which is defined as loss of electrons. OIL RIG oxidation is loss, reduction is gain.
Ions are formed by the gain OR loss of an electron.
nonmetals gain electronsmetals lose electrons
When an atom gains or loses a valence electron, it forms an ion. Atoms form ions in order to help another to obtain a full octet and to stabilize the valence.
Group-14 elements share electrons. they form covalent bonds.
Ions. Specifically Cations. Particles that gain electrons are anions.