Answer:
Anion is negatively charged particle.
Calcium +2. Its cation
Oxygen -2
Explanation:
An anion is a charged particle with a negative charge. Anions has charge of -1
Oxygen require two electrons to complete its octet and hence its charge is -2
Calcium is a cation and has a positive charge of +2
Sodium is categorized as a B. Element.
Answer:
a three-dimensional shape having eight plane faces, especially a regular solid figure with eight equal triangular faces.
Explanation: