Barium is an alkaline-earth metal, which means it has two valence electrons. To fulfill the octet rule (see below), it wants to lose those two electrons. When it does this, the number of positive protons is greater than the negative electrons; the ion is positive. Positive ions are called anions.
Barium hydroxide is not a cation or an anion. It is a compound. It is made of barium ions and hydroxide ions.
The ionic compound name for BaCO3 is barium carbonate. Barium is the cation with a 2+ charge, while carbonate is the anion with a 2- charge.
Calcium chloride is a salt; calcium is the cation and chloride the anion.
Scandium is a cation because it tends to lose electrons to form a positive charge.
polyatomic anion
Barium hydroxide is not a cation or an anion. It is a compound. It is made of barium ions and hydroxide ions.
The anion of barium chloride is chloride (Cl-). Barium chloride is an ionic compound composed of the cation barium (Ba2+) and the anion chloride.
The ionic compound name for BaCO3 is barium carbonate. Barium is the cation with a 2+ charge, while carbonate is the anion with a 2- charge.
The charge on the cation in barium sulfide is +2, as barium is in Group 2 of the periodic table and typically forms cations with a 2+ charge.
Calcium chloride is a salt; calcium is the cation and chloride the anion.
Scandium is a cation because it tends to lose electrons to form a positive charge.
polyatomic anion
when barium chloride dissociates, it produces : Ba2+ ions (cation) Cl- ions (anion)
Barium loses two electrons in a reaction, so it becomes positive or a cation.
Two bromide ions can combine with one barium cation to form an ionic compound, because a barium cation has an electrical charge of +2, while a bromide anion has an electrical charge of -1.
The PO4^3- ion is a polyatomic anion. It consists of a group of atoms with an overall negative charge.
An anion has gained electrons and therefore has a negative charge, while a cation has lost electrons and therefore has a positive charge.