Barium can form ions with a +2 charge and it is called a cation.
Ex:- Ba(s)+2HCl(aq)→BaCl2(aq)+H2(g)
In this redox reaction,
initially, barium shows 0 (s) oxidation no. and after forming the product its oxidation no. changes to +2 (in aq).
When a metal loses electrons and a nonmetal gets those electrons, cations (positively charged ions) and anions (negatively charged ions) are created.
<h3>Ionic bonds are created when a metal and a nonmetal interact. The position of an element on the periodic table can frequently tell you what charge an ion generally carries:</h3>
- the alkali metals (the IA elements) lose a single electron and form a 1+ charge.
- the alkaline earth metals (IIA elements) lose two electrons and form a 2+ cation.
- IIIA family member aluminum loses three electrons to become a 3+ cation.
- Seven valence electrons are shared by all of the halogens (VIIA elements) and each of them has a single negative charge, forming an anion.
- The VIA elements pick up two electrons to create 2- charged anions.
- The VA elements pick up three extra electrons to create 3- charged anions.
To know more about elements of the periodic table refer to:-
brainly.com/question/25916838
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