Question

A negatively charged ion in a compound is called:
A. Ion
B. Negative ion
C. Cation
D. Anion

Answer 1

Hint: The answer of this question has more electrons than protons, consequently giving it a net negative charge. For this to form, one or more electrons must be gained, typically pulled away from other atoms with a weaker affinity for them.

Complete step-by-step answer:
To answer this question, we have to start from the start.
We should know that if an atom, or atoms, has a balanced number of electrons (negative charge) and protons (positive charge) they are neutral overall. However, if they are not balanced, they will be charged. These charged species are called ions. An ion can either be positive ion or negative ion.
Now we should know about cation. We should know that cation has more protons than electrons, consequently giving it a net positive charge. For a cation to form, one or more electrons must be lost, typically pulled away by atoms with a stronger affinity for them. The number of electrons lost, and so the charge of the ion is indicated after the chemical symbol, for example silver (Ag) loses one electron to become$A{{g}^{+}}$, while zinc (Zn) loses two electrons to become$Z{{n}^{2+}}$.
Now, we should know that an anion has more electrons than protons, consequently giving it a net negative charge. For an anion to form, one or more electrons must be gained, typically pulled away from other atoms with a weaker affinity for them. The number of electrons gained, and so the charge of the ion, is indicated after the chemical symbol, for example chlorine (Cl) gains one electron to become $C{{l}^{-}}$whilst oxygen (O) gains two electrons to become${{O}^{2-}}$.
So, the above discussion leads us to our answer. From the above discussion we came to know that a negatively charged ion in a compound is called anion.

Note: We know that metallic atoms hold some of their electrons relatively loosely. Consequently, they tend to lose electrons and form cations. Conversely, most non-metallic atoms attract electrons more strongly than metallic atoms, and so gain electrons to form anions. Therefore, when metallic and a non-metallic element combine, the non-metallic atoms tend to draw one or more electrons away from the metallic atoms to form ions. These oppositely charged ions then attract one another to form ionic bonds and produce ionic compounds with no overall net charge. Examples include calcium chloride ($CaC{{l}_{2}}$), potassium iodide (KI) and magnesium oxide (MgO).